Não informado. (1948). Report and Short Papers. Institute of Freshwater Research.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Report and Short Papers. Drottningholm, Suecia: Institute of Freshwater Research, 1948.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Report and Short Papers. Institute of Freshwater Research, 1948.
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