Révision du genre Euplotes, fondée sur la comparaison des structures superficielles Michel Tuffrau ReviewPaper Pages: 1 - 77
Contribution to the comparative physiology and genetics of the european salmonidae J. T. Spaas OriginalPaper Pages: 78 - 88
Ecological studies on Olifantsvlei, near Johannesburg A. D. HarrisonP. KellerD. Dimovič OriginalPaper Pages: 89 - 134
The comparative activity of some digestive enzymes in the alimentary canal of Tilapia and perch G. R. Fish OriginalPaper Pages: 161 - 178
The Ephemeroptera, Plecoptera and Trichoptera caught by emergence traps in two streams during 1958 T. Gledhill OriginalPaper Pages: 179 - 188