Nygaard, G. (1949). Hydrobiological studies on some Danish ponds and lakes. Part II. The quotient hypothesis and some new or little known phytoplankton organisms. Det Kongelige Danske Videnskabernes Selskab, Biologiske Shrifter, 7: 1-293.
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Nygaard, G.
1949
Hydrobiological studies on some Danish ponds and lakes. Part II. The quotient hypothesis and some new or little known phytoplankton organisms.
Det Kongelige Danske Videnskabernes Selskab, Biologiske Shrifter