Author: Berg, Kaj & G.Nygaard.
Title: Studies on the Plankton in the lake of Frederiksborg Castle.
Description: Kobenhavn, 1929. 90 pp. 6 plts & 27 figs. Soft cover. (Mém. Ac. Royale des Sciences).

Keywords: Hydrobiology Scandinavia Hydrobiologie Scandinavië