1. La place des principes d'expérimentation en pisciculture

   • R. Gruber

   OriginalPaper Pages: 225 - 242

2. Beiträge zur kenntnis der süsswasserrotalge thorea ramosissima bory

   • G. Uherkovich

   OriginalPaper Pages: 243 - 251

3. On nutrition of caddis worms Phryganea grandis L.

   • N. N. Smirnov

   OriginalPaper Pages: 252 - 252

4. The vertical distribution of Larval Chironomidae (Dipt.) in the mud of a stream

   • John B. Ford

   OriginalPaper Pages: 262 - 262

5. Nutria influence on a Bog Lake in Northern Pomorze, Poland

   • S. Ehrlich
   • K. Jedynak

   OriginalPaper Pages: 273 - 297

6. Bibliography

   Legacy Pages: 298 - 298