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Wang, Y., Zhang, W., Zheng, S. et al. New discovery of fossil cycad-like plants from the Middle Jurassic of West Liaoning, China. Chin.Sci.Bull. 50, 1805–1808 (2005). https://doi.org/10.1360/982005-121
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DOI: https://doi.org/10.1360/982005-121