Titlebook: Cladocera; Proceedings of the C László Forró,David G. Frey Conference proceedings 1987 Dr W. Junk Publishers, Dordrecht 1987 Danube.Groundw

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er at more or less regular intervals to discuss their subjects. This has hap- pened e. g. with the Chironomidae, Ephemeroptera, and Plecoptera among the aquatic insects, and the Rotifera, Copepoda, and Ostracoda among the zooplankton. Finally the scientists working with the Cladocera, who have been

Sigmoidoscopy