PAIN, D J; EON, L. Methods of investigating the presence of ingested lead shot in waterfowl gizzards: an improved visual technique. Wildfowl, [S. l.], v. 44, p. 184–190, 1993. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154690. Acesso em: 15 apr. 2026.