Wright, J. F. (1974). Some factors affecting the distribution of Crenobia alpina (Dana), Polycelis felina (Dalyell) and Phagocata vitta (Dugès) (Platyhelminthes) in Caernarvonshire, North Wales Freshwater Biology, 4(1): 31-39
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Wright, J. F.
1974
Some factors affecting the distribution of Crenobia alpina (Dana), Polycelis felina (Dalyell) and Phagocata vitta (Dugès) (Platyhelminthes) in Caernarvonshire, North Wales