CAMPBELL, L H. Local variations in the proportion of adult males in flocks of Goldeneye wintering in the Firth of Forth. Wildfowl, [S. l.], v. 28, p. 4, 1977. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154347. Acesso em: 5 apr. 2026.