BAILEY, S; BUNYAN, P J; HAMILTON, G A; JENNINGS, D M; STANLEY, P I. Accidental poisoning of wild geese in Perthshire, November 1971. Wildfowl, [S. l.], p. 88–91, 1972. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154903. Acesso em: 18 dec. 2025.