HARRISON, J M; HARRISON, J G; MEIKLE, A. Part I. Development of the wildfowl population. Wildfowl, [S. l.], v. 18, p. 43–46, 1967. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/155604. Acesso em: 5 apr. 2026.