KILPI, M.; HARIO, M. Wing-tip pattern and possible affinities of coastal Finnish Herring Gulls Laurus argentatus. Ornis Fennica, [S. l.], v. 63, n. 2, p. 52–54, 1986. Disponível em: https://ornisfennica.journal.fi/article/view/133206. Acesso em: 23 nov. 2024.