Skip to main content

Advertisement

Log in

Perceptions of climate change impacts and adaptation measures used by crop smallholder farmers in Amathole district municipality, Eastern Cape province, South Africa

  • Published:
GeoJournal Aims and scope Submit manuscript

Abstract

The climate is changing, with imminent threats. Projections for increased inconsistencies in climatic elements such as rainfall and temperature have continued to raise concerns, particularly amongst crop producers. Globally, about eighty-two per cent of crop production activities are rain fed; crop yields are thus considered under threat. The majority of South African smallholder and resource-poor crop production farmers rely heavily on rain-fed agriculture, making them vulnerable to the vagaries of climate change risks. As sustainability is crucial to the continuous survival of this population, this study assessed their perceptions of climate change impacts on crop production activities and their adaptation responses. A multistage sampling procedure was used to select a total of 130 crop smallholder farmers from 18 villages in the Mbahashe Local Municipality, from the Amathole District, Eastern Cape Province, South Africa. Simple descriptive statistical tools, principal component analysis and Ward’s linkage cluster analysis were used for the study’s data analysis. Findings revealed a perceived increase in temperature levels and a drastic decline in rainfall. Harsh and aggressive climatic conditions, with attendant problems of drought, heat waves and wind speed, were also indicated. There is a perceived increased difficulty in production activities as a result of water scarcity, poor soil conditions, pest infestations and disease infections, amongst many other challenges. There is a growing threat of unsustainable agricultural production, which may in due course increase poverty levels among the smallholder farmers. In order to sustain production activities, immediate government interventions are required for appropriate extension service delivery, particularly in the area of climate change coping and adaptation responses.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1

Source: Field Survey, 2016

Fig. 2

Source: Field Survey, 2016

Fig. 3

Source: Field Survey, 2016

Fig. 4

Source: Field Survey, 2016

Fig. 5

Source: Field Survey, 2016

Similar content being viewed by others

References

  • Abeka, S., Anwer, S., Huamaní, R. B., Bhatt, V., Bii, S., Muasya, B. P., Rozario, A. R., Senisse, H. R., & Soría, G. V. (2012). Women farmers adapting to climate change. Four examples from three continents of women’s use of local knowledge in climate change adaptation. Dialogue 09. https://www.unscn.org/uploads/web/news/Women-farmers-adapting-to-Climate-Change.pdf. Accessed 14 July 2015.

  • AGRI SA. (2016). A raindrop in the drought. report to the multi-stakeholder task team on the drought. Agri SA’s status report on the current drought crisis. (Online) http://www.nstf.org.za/wp-content/uploads/2016/06/Agri-SA-Drought-Report_CS4.pdf. Accessed 18 Feb 2017.

  • Ahmed, M., Asif, M., Sajad, M., Khattak, J. Z. K., Ijaz, W., Fayyaz-ul-Hassan, W., et al. (2013). Could agricultural system be adapted to climate change? A review. Australian Journal of Crop Science, 7(11), 1642.

    Google Scholar 

  • Ajambang, W., Ardie, S.W., Volkaert, H., Galdima, M., & Sudarsono, S. (2015). Huge carbohydrate assimilates delay response to complete defoliation stress in oil palm (Elaeis guineensis Jacq.). Emirates Journal of Food and Agriculture, 27(1), 126.

    Article  Google Scholar 

  • Alade, O. A., & Ademola, A. O. (2013). Perceived effect of climate variation on poultry production in oke ogun area of oyo state. Journal of Agricultural Science, 5(10), 176–182.

    Article  Google Scholar 

  • Balew, S., Agwata, J., & Anyango, S. (2014). Determinants of adoption choices of climate change adaptation strategies in crop production by small scale farmers in some regions of Central Ethiopia. Journal of Natural Sciences Research, 4(4), 78–93.

    Google Scholar 

  • Barnes, A. P., & Toma, L. (2012). A typology of dairy farmer perceptions towards climate change. Climatic Change, 112(2), 507–522.

    Article  Google Scholar 

  • Bathke, D. J., Oglesby, R., Rowe, C., & Wilhite, D. A. (2014). Understanding and assessing climate change: Implications for nebraska. A synthesis report to support decision making and natural resource management in a changing climate. http://snr.unl.edu/download/research/projects/climateimpacts/2014ClimateChange.pdf. Accessed 14 July 2015.

  • Benhin, J. K. (2008). South African crop farming and climate change: an economic assessment of impacts. Global Environmental Change, 18(4), 666–678.

    Article  Google Scholar 

  • Berman, R.J., Quinn, C.H., & Paavola, J. (2013). Identifying drivers of household coping strategies to multiple climatic hazards in Western Uganda: Implications for adapting to future. In Climate Change. Centre for Climate Change Economics and Policy Working Paper No. 149, Sustainability Research Institute Paper No. 51, 1–33.

  • Bidogeza, J., Berentsen, P. B. M., De Graaff, J., & Oude Lansink, A. G. J. M. (2009). A type of farm households for the Umutara Province in Rwanda. Food Security, 1(3), 321–335.

    Article  Google Scholar 

  • Burns, R., & Burns, R. P. (2008). Business research methods and statistics using SPSS. London: Sage Publications Limited.

    Google Scholar 

  • Clements, R., Haggar, J., Quezada, A., & Torres, J. (2011). Technologies for climate change adaptation - Agricultural sector. In X. Zhu (Ed.), TNA guidebook series. Roskilde: UNEP Risø Centre.

  • Costello, A., & Osborne, J. (2011). Best practices in exploratory factor analysis: Four recommendations for getting the most from your analysis. Practical Assessment, Research and Evaluation 10(7), Online http://pareonline.net/pdf/v10n7.pdf. Accessed 13 Dec 2015.

  • Craft, K. E., Mahmood, R., King, S. A., Goodrich, G., & Yan, J. (2017). Droughts of the twentieth and early twenty-first centuries: Influences on the production of beef and forage in Kentucky, USA. Science of the Total Environment, 577(2017), 122–135.

    Article  Google Scholar 

  • DAFF, Department of Agriculture, Forestry and Fisheries. (2013). Policy brief: Opportunities and challenges for climate-smart agriculture in Africa. DAFF, Pretoria. (Online) https://ccafs.cgiar.org/sites/default/files/assets/docs/au_policybrief_opportunitieschallenges.pdf. Accessed 15 June 2016.

  • DAFF, Department of Agriculture, Forestry and Fisheries. (2016). Official newsletter of the department of agriculture, forestry and fisheries. January 2016, DAFFnews No. 1 (Online) http://www.daff.gov.za/docs/agrinews/jan2016.pdf. Accessed 14 Feb 2017.

  • Dai, A. G. (2011). Drought under global warming: A review. Wiley Interdisciplinary Reviews: Climate Change, 2(1), 45–65.

    Google Scholar 

  • Dobermann, A., Nelson, R., Beever, D., Bergvinson, D., Crowley, E., Denning, G., Giller, K., d’Arros Hughes, J., Jahn, M., & Lynam, J. (2013). Solutions for sustainable agriculture and food systems. Technical report for the post-2015 development agenda. Sustainable Development Solutions Network.

  • DWAF (Department of Water Affairs and Forestry). (2004). National water resource strategy. First edition, September, 2004. DWAF, Pretoria. (Online) http://www.wrc.org.za/Knowledge%20Hub%20Documents/Other/NWRA%20Sept04.pdf. Accessed 14 June 2016.

  • Eitzinger, J., Orlandini, S., Stefanski, R., & Naylor, R. E. L. (2010). Climate change and agriculture: Introductory editorial. The Journal of Agricultural Science, 148(05), 499–500.

    Article  Google Scholar 

  • Farauta, B.K., Egbule, C.L., Idrisa, Y.L., & Agu, V.C. (2011). Farmers’ perceptions of climate change and adaptation strategies in Northern Nigeria: An empirical assessment. African Technology Policy Studies Network Research Paper/No. 15, 1–32.

  • Field, A. (2009). Discovering statistics using SPSS. London: Sage Publications Limited.

    Google Scholar 

  • Goldblatt, A. (2010). Agriculture: Facts and trends, South Africa. For World Wildlife Forum, South Africa (WWF-SA). http://awsassets.wwf.org.za/downloads/facts_brochure_mockup_04_b.pdf. Accessed 18 Sep 2015.

  • GSA, Geological Society of America (2015). Position statement on climate change. (Online) https://www.geosociety.org/documents/gsa/positions/pos10_climate.pdf. Accessed 14 July 2015.

  • Gwimbi, P. (2009). Cotton farmers’ vulnerability to climate change in Gokwe District (Zimbabwe): Impact and influencing factors. Journal of Disaster Risk Studies, 2(2), 81–92.

    Google Scholar 

  • Hair, J. F., Anderson, R. E., Tatham, R. L., & Black, W. C. (1998). Multivariate data analysis (5th ed.). Upper Saddle River, NJ: Prentice Hall International.

    Google Scholar 

  • Hassan, R., & Nhemachena, C. (2008). Determinants of African farmers’ strategies for adapting to climate change: Multinomial choice analysis. African Journal of Agricultural and Resource Economics, 2(1), 83–104.

    Google Scholar 

  • Hatfield, J. L., Boote, K. J., Kimball, B. A., Ziska, L. H., Izaurralde, R. C., Ort, D., et al. (2011). Climate impacts on agriculture: Implications for crop production. Agronomy Journal, 103(2), 351–370.

    Article  Google Scholar 

  • IFAD, International Fund for Agricultural Development. (2010). Climate change strategy. (Online) https://www.ifad.org/topic/tags/climate_change/2154532. Accessed 5 Sep 2015.

  • IFAD, International Fund for Agricultural Development. (2014). The adaptation advantage: The economic benefits of preparing small-scale farmers for climate change. (Online) https://www.ifad.org/documents/10180/0a24e248-3f96-49af-b2df-ebbce284335c. Accessed 8 June 2015.

  • IPCC, Intergovernmental Panel on Climate Change. (2014). Climate change: Impacts, adaptation, and vulnerability—summary for policymakers, WGII AR5. (Online) https://www.ipcc.ch/pdf/assessment-report/ar5/wg2/WGIIAR5IntegrationBrochure_final.pdf. Accessed 14 July 2015.

  • ISDR, International Strategy for Disaster Reduction. (2008). Climate change and disaster risk reduction. Geneva, September 2008. Briefing Note 01. (Online) http://eird.org/publicaciones/Climate-Change-DRR.pdf. Accessed 14 July 2015.

  • Janssens, W., De Pelsmacker, P., Wijnen, K., & Van Kenhove, P. (2008). Marketing research with SPSS. Upper Saddle River, NJ: Prentice Hall.

    Google Scholar 

  • Jiang, Y., & Koo, W. W. (2014). Estimating the local effect of weather on field crop production with unobserved producer behavior: A bioeconomic modeling framework. Environmental Economics and Policy Studies, 16(3), 279–302.

    Article  Google Scholar 

  • Juana, J. S., Kahaka, Z., & Okurut, F. N. (2013). Farmers’ perceptions and adaptations to climate change in Sub-Sahara Africa: A synthesis of empirical studies and implications for public policy in African agriculture. Journal of Agricultural Science, 5(4), 121–135.

    Article  Google Scholar 

  • Kangalawe, R., Mwakalila, S., & Masolwa, P. (2011). Climate change impacts, local knowledge and coping strategies in the Great Ruaha River catchment area, Tanzania. Natural Resources, 2(2011), 212–223.

    Article  Google Scholar 

  • Kassie, B. T., Hengsdijk, H., Rötter, R., Kahiluoto, H., Asseng, S., & Van Ittersum, M. (2013). Adapting to climate variability and change: Experiences from cereal-based farming in the Central Rift and Kobo Valleys, Ethiopia. Environmental Management, 52(5), 1115–1131.

    Article  Google Scholar 

  • Köbrich, C., Rehman, T., & Khan, M. (2003). Typification of farming systems for constructing representative farm models: Two illustrations of the application of multi-variate analyses in Chile and Pakistan. Agricultural Systems, 76(1), 141–157.

    Article  Google Scholar 

  • Kosová, K., Vítámvás, P., Urban, M. O., Klíma, M., Roy, A., & Prášil, I. T. (2015). Biological networks underlying abiotic stress tolerance in temperate crops—A proteomic perspective. International Journal of Molecular Sciences, 16(9), 20913–20942.

    Article  Google Scholar 

  • Kruger, A. C., & Shongwe, S. (2004). Temperature trends in South Africa: 1960–2003. International Journal of Climatology, 24(15), 1929–1945.

    Article  Google Scholar 

  • Kusakari, Y., Asubonteng, K. O., Jasaw, G. S., Dayour, F., Dzivenu, T., Lolig, V., Donkoh, S. A., Obeng, F. K., Gandaa, B., & Kranjac-Berisavljevic, G. (2014). Farmer-perceived effects of climate change on livelihoods in Wa West District, Upper West Region of Ghana. Journal of Disaster Research, 9(4), 516–528.

    Article  Google Scholar 

  • Łabędzki, L. (2016). Actions and measures for mitigation drought and water scarcity in agriculture. Journal of Water and Land Development, 29(1), 3–10.

    Article  Google Scholar 

  • Laux, P., Jäckel, G., Tingem, R. M., & Kunstmann, H. (2010). Impact of climate change on agricultural productivity under rainfed conditions in Cameroon—a method to improve attainable crop yields by planting date adaptations. Agricultural and Forest Meteorology, 150(9), 1258–1271.

    Article  Google Scholar 

  • Leiserowitz, A., Feinberg, G., Rosenthal, S., Smith, N., Anderson, A., Roser-Renouf, C., & Maibach, E. (2014). What’s in a name? Global warming vs. climate change. Yale project on climate change communication, New Haven: CT. http://climatecommunication.yale.edu/wp-content/uploads/2014/05/Global-Warming_Climate-Change_Report_May_2014.pdf. Accessed 14 July 2015.

  • Li, S., An, P., Pan, Z., Wang, F., Li, X., & Liu, Y. (2015). Farmers’ initiative on adaptation to climate change in the Northern Agro-Pastoral Ecotone. International Journal of Disaster Risk Reduction, 12(2015), 278–284.

    Article  Google Scholar 

  • Lobell, D. B., & Field, C. B. (2007). Global scale climate–crop yield relationships and the impacts of Recent Warming. Environmental research letters, 2(1), 014002.

    Article  Google Scholar 

  • Macharia, P. N., Thuranira, E. G., Ngángá, L. W., Lugadiru, J., & Wakori, S. (2012). Perceptions and adaptation to climate change and variability by immigrant farmers in semi-arid regions of Kenya. African Crop Science Journal, 20(2), 287–296.

    Google Scholar 

  • Madzwamuse, M. (2010). Climate change vulnerability and adaptation preparedness in South Africa. Cape Town: Heinrich Böll Stiftung South Africa.

    Google Scholar 

  • Maponya, P., & Mpandeli, S. (2012). Climate change adaptation strategies used by Limpopo province farmers in South Africa. Journal of Agricultural Science, 4(12), 48–60.

    Article  Google Scholar 

  • Megersa, B., Markemann, A., Angassa, A., Ogutu, J. O., Piepho, H. P., & Zárate, A. V. (2014). Livestock diversification: An adaptive strategy to climate and rangeland ecosystem changes in Southern Ethiopia. Human ecology, 42(4), 509–520.

    Article  Google Scholar 

  • Mendelsohn, R. (2007). Past climate change impacts on agriculture. In R. Evenson & P. Pingali (Eds.), Handbook of agricultural economics (Vol. 3, pp. 3009–3031). North Holland: Elsevier.

    Google Scholar 

  • Mitchell, T., & Tanner, T. (2006). Adapting to climate change: Challenges and opportunities for the development community. Brighton: Institute of Development Studies, Tearfund Collaboration.

    Google Scholar 

  • Morgan-Davies, C., Waterhouse, T., & Wilson, R. (2011). Characterisation of farmers’ responses to policy reforms in Scottish Hill farming areas. Small Ruminant Research, 102(2–3), 96–107.

    Google Scholar 

  • Morris, K. S., & Bucini, G. (2016). California’s drought as opportunity: Redesigning U.S. agriculture for a changing climate. Elementa: Science of the Anthropocene, 4(142), 1–12.

    Google Scholar 

  • Mpandeli, S., Nesamvuni, E., & Maponya, P. (2015). Adapting to the impacts of drought by smallholder farmers in Sekhukhune District in Limpopo Province, South Africa. Journal of Agricultural Science, 7(2), 115–124.

    Article  Google Scholar 

  • Nainggolan, D., Termansen, M., Reed, M. S., Cebollero, E. D., & Hubacek, K. (2012). Farmer typology, future scenarios and the implications for ecosystem service povision: A case study from South-eastern Spain. Regional Environmental Change, 13(3), 601–614.

    Article  Google Scholar 

  • Nath, R., Nath, D., Li, Q., Chen, W., & Cui, X. (2017). Impact of drought on agriculture in the Indo-Gangetic Plain, India. Advances in Atmospheric Sciences, 34(3), 335–346.

    Article  Google Scholar 

  • Ndamani, F., & Watanabe, T. (2015). Farmers’ perceptions about adaptation practices to climate change and barriers to adaptation: A micro-level study in Ghana. Water, 7(9), 4593–4604.

    Article  Google Scholar 

  • Nkeme, K. K., & Ndaeyo, N. U. (2013). Climate change and coping strategies among peasant farmers in AkwaIbom State, Nigeria. International Journal of Basic and Applied Sciences, 2(1), 24–28.

    Google Scholar 

  • Nkomwa, E. C., Joshua, M. K., Ngongondo, C., Monjerezi, M., & Chipungu, F. (2014). Assessing indigenous knowledge systems and climate change adaptation strategies in agriculture: A case study of Chagaka Village, Chikhwawa, Southern Malawi. Physics and Chemistry of the Earth, Parts A/B/C, 67, 164–172.

    Article  Google Scholar 

  • Nti, F. K., & Barkley, A. (2012). The response to climate variability among farm families in Northern Ghana. Journal of International Agricultural Trade and Development, 8(2), 183–211.

    Google Scholar 

  • OECD, Organisation for Economic Co-operation and Development. (2015). Agriculture and climate change (Online) https://www.oecd.org/tad/sustainable-agriculture/agriculture-climate-change-september-2015.pdf. Accessed 14 Aug 2017.

  • Padgham, J. (2009). Agricultural development under a changing climate: Opportunities and challenges for adaptation. World Bank. Joint Departmental Discussion Paper- Issue 1 Agriculture and Rural Development and Environment Departments.

  • Pallant, J. (2013). A step by step guide to data analysis using IBM SPSS. SPSS survival manual. 5th Ed. Open University Press. McGraw-Hill House, Berkshire, England. SL6 3Ql. p. 354.

  • Pedrick, C., (2012). Strategies for combating climate change in drylands agriculture: Synthesis of dialogues and evidence presented at the international conference on food security in dry lands, Doha, Qatar, November, 2012.

  • Pickens, J. (2005). Attitudes and perceptions. In N. Borkowski (Ed.), Organizational behavior in health care (pp. 43–75). Sudbury, MA: Jones and Bartlett Publishers.

    Google Scholar 

  • SAWS, South African Weather Service. (2017). Seasonal climate watch february to june 2017 (Online) http://www.gfcsa.net/SAWS/saws.pdf. Accessed 14 Aug 2017.

  • SAWS, South African Weather Service. (2017). Seasonal climate watch june to october 2017 (Online) http://www.waterwise.co.za/export/sites/water-wise/water/weatherforecast/downloads/Seasonal_Climate_Watch_-_May_2017.pdf. Accessed 14 Aug 2017.

  • Shakoor, U., Saboor, A., Baig, I., Afzal, A., & Rahman, A. (2015). Climate variability impacts on rice crop production in Pakistan. Pakistan Journal of Agricultural Research, 28(1), 19–27.

    Google Scholar 

  • Shongwe, P., Masuku, M. B., & Manyatsi, A. M. (2014). Cost benefit analysis of climate change adaptation strategies on crop production systems: A case of Mpolonjeni area development programme (ADP) in Swaziland. Sustainable Agriculture Research, 30(1), 37–49.

    Article  Google Scholar 

  • Sipungu, T. (2016). A brief review of the performance of the Eastern Cape in terms of the statistics South Africa community survey, 2016. Public service accountability monitor (PSAM). (Online) http://psam.org.za/wp-content/uploads/2017/01/Brief-24-11-2016-17.pdf. Accessed 13 Feb 2017.

  • Speranza, C. I. (2010). Drought coping and adaptation strategies: Understanding adaptations to climate change in agro-pastoral livestock production in Makueni District, Kenya. European Journal of Development Research, 22(5), 623–642.

    Article  Google Scholar 

  • Tatar, Ö. (2016). Climate change impacts on crop production in Turkey. Agronomy Series of Scientific Research/Lucrari Stiintifice Seria Agronomie, 59(2), 135–140.

    Google Scholar 

  • Teqja, Z., Kopali, A., Libohova, Z., & Owens, P. R. (2017). A study of the impacts of climate change scenarios on the plant hardiness zones of Albania. Journal of Applied Meteorology and Climatology, 56(3), 615–631.

    Article  Google Scholar 

  • Terdoo, F., & Adekola, O. (2014). Perceptions, knowledge, adaptation and socio-economic cost of climate change in Northern Nigeria. Journal of Agricultural Science, 6(8), 60–71.

    Article  Google Scholar 

  • Tesso, G., Emana, B., & Ketema, M. (2012). Econometric analysis of local level perception, adaptation and coping strategies to climate change induced shocks in North Shewa, Ethiopia. International Research Journal of Agricultural Science and Soil Science, 2(8), 347–363.

    Google Scholar 

  • The Royal Society and US National Academy of Science. (2014). Climate change evidence and causes: (Online) https://royalsociety.org/~/media/Royal_Society_Content/policy/projects/climate-evidence-causes/climate-change-evidence-causes.pdf. Accessed 14 July 2015.

  • Trevors, J. T. (2010). Climate change: Agriculture and hunger. An International Journal of Environmental Pollution: Water Air Soil Pollution, 205(Supplement 1), 105.

    Google Scholar 

  • Turpie, J., & Visser, M. (2013). The impact of climate change on South Africaʼs rural areas. Financial and Fiscal Commission. Submission for the 2013/14 Division of Revenue.

  • UNDP, United Nations Development Programme, UNCCD, United Nations Convention to Combat Desertification & UNEP, United Nations Environment Programme. (2009). Climate change in the African drylands: Options and opportunities for adaptation and mitigation. (Online) https://portals.iucn.org/library/sites/library/files/documents/Bios-Eco-Ter-Ar-6-013.pdf. Accessed 14 July 2015.

  • UNEP, United Nations Environment Programme. (2010). Climate change: An overview—vision for 2010. (Online) http://www.unep.org/climatechange. Accessed 14 July 2015.

  • UNFCCC, United Nations Framework Convention on Climate Change. (2007). Climate change: Impacts, vulnerabilities and adaptation in developing countries. (Online) https://unfccc.int/resource/docs/publications/impacts.pdf. Accessed 14 July 2015.

  • Van Loon, A. F., Van Dijk, A. I., Tallaksen, L. M., Teuling, A. J., Hannah, D. M., & Van Lanen, H. A. (2016). Drought in a human-modified world: Reframing drought definitions, understanding, and analysis approaches. Hydrology and Earth System Sciences, 20(9), 3631.

    Article  Google Scholar 

  • Voss, A. G. J., Spiller, A., & Enneking, U. (2009). Farmer acceptance of genetically modified seeds in Germany: Results of a cluster analysis. International Food and Agribusiness Management Review, 12(4), 61–80.

    Google Scholar 

  • Wiid, N., & Ziervogel, G. (2012). Adapting to climate change in South Africa: Commercial farmers’ perception of and response to changing climate. South African Geographical Journal, 94(2), 152–173.

    Article  Google Scholar 

  • WWF SA, World Wide Fund for Nature, South Africa. (2013). An introduction to South Africa’s water source areas—the 8% land area that provides 50% of our surface water. (Online) http://awsassets.wwf.org.za/downloads/wwf_sa_watersource_area10_lo.pdf. Accessed 14 June 2016.

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Oluwabunmi Oluwaseun Popoola.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Popoola, O.O., Monde, N. & Yusuf, S.F.G. Perceptions of climate change impacts and adaptation measures used by crop smallholder farmers in Amathole district municipality, Eastern Cape province, South Africa. GeoJournal 83, 1205–1221 (2018). https://doi.org/10.1007/s10708-017-9829-0

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10708-017-9829-0

Keywords

Navigation