KOSKIMIES, J. Polymorphic variability in clutch size and laying date of the velvet scoter, Melanitta fusca (L,). Ornis Fennica, [S. l.], v. 34, n. 4, p. 118–128, 1957. Disponível em: https://ornisfennica.journal.fi/article/view/132613. Acesso em: 23 nov. 2024.