Não informado. (1948). Report and Short Papers. Institute of Freshwater Research.
Chicago-referens (17:e uppl.)Não informado. Report and Short Papers. Drottningholm, Suecia: Institute of Freshwater Research, 1948.
MLA-referens (8:e uppl.)Não informado. Report and Short Papers. Institute of Freshwater Research, 1948.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.