BOYD, Hugh. P. M. Scott on geese on the Wash and the Solway Firth, 1927-1933. Wildfowl, [S. l.], v. 47, p. 204–211, 1996. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154633. Acesso em: 3 apr. 2026.