Polymorphic variability in clutch size and laying date of the velvet scoter, Melanitta fusca (L,)
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Koskimies, J. (1957). Polymorphic variability in clutch size and laying date of the velvet scoter, Melanitta fusca (L,). Ornis Fennica, 34(4), 118–128. Hämtad från https://ornisfennica.journal.fi/article/view/132613
