OGILVIE, M A; EVANS, Mary; MATTHEWS, G V T; JOHNSTONE, S T. Current Reports, 1969, Slimbridge. Wildfowl, [S. l.], v. 21, n. 21, p. 133-, 1970. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154918. Acesso em: 18 dec. 2025.