A list of new genera and type species of flagellates and algae published in 1966–1968 B. V. Skvortzov OriginalPaper Pages: 1 - 7
Carotenoids in fish I. Carotenoids in the eggs of Acipenser ruthenus ruthenus L. (Acipenseridae) from the Danube B. Czeczuga OriginalPaper Pages: 9 - 16
Vergleichende Braunwasser-Teichstudien im niederösterreichischen Waldviertel Friederike Wawrik OriginalPaper Pages: 17 - 82
The Phragmites communis Trin. chromosome complement in the Danube Delta P. RaicuStefania StaicuT. Roman OriginalPaper Pages: 83 - 89
A hydrobiological study of the polluted river Lieve (Ghent, Belgium) Willem H. O.Frans M. J. C. Evens OriginalPaper Pages: 91 - 154