The occurrence of the blue-green algaOscillatoria agardhii Gom. In some waters discharging into the Lauwersmeer (The Netherlands) A. Bij De Vaate OriginalPaper Pages: 55 - 59
Eutrophication and occurrence ofOscillatoria agardhii Gom. in the lakes bordering on Flevoland C. Berger Report Pages: 60 - 61
Growth ofOscillatoria agardhii Gom. Louis Van LiereWanda ZevenboomLuuc R. Mur OriginalPaper Pages: 62 - 70
Effects of a light-dark cycle on the growth ofScenedesmus protuberans Fritsch in light-limited continuous cultures Herman J. GonsDaan BarugLuuc R. Mur OriginalPaper Pages: 71 - 80
The development of periphyton on artificial substrates S. J. Herder-Brouwer OriginalPaper Pages: 81 - 86
Relations between water mites of the genusHydrachna and the corixidsSigara striata andCymatia coleoptrata C. DavidsC. J. F. Schoots Report Pages: 89 - 89
Oecologische gevolgen van de visserij op Noordzee-Kabeljauw Daan N.J. J. Zijlstra Publications Pages: 89 - 90
The relevance of desmids in the biological typology and evaluation of fresh waters Coesel P. F. M. Erratum Pages: 91 - 91