Não informado. (1948). Report and Short Papers. Institute of Freshwater Research.
Chicago-viite (17. p.)Não informado. Report and Short Papers. Drottningholm, Suecia: Institute of Freshwater Research, 1948.
MLA-viite (8. p.)Não informado. Report and Short Papers. Institute of Freshwater Research, 1948.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.