KILPI, M.; SAUROLA, P. Wintering areas of Great Black-backed and Herring Gulls from Heinäsaaret, the arctic USSR, and the northern Baltic in 1930–40. Ornis Fennica, [S. l.], v. 60, n. 3, p. 91–93, 1983. Disponível em: https://ornisfennica.journal.fi/article/view/133135. Acesso em: 23 nov. 2024.