PYNNÖNEN, A. On the interspecific aggressiveness of the Black-throated Diver Gavia arctica. Ornis Fennica, [S. l.], v. 48, n. 3–4, p. 133–134, 1971. Disponível em: https://ornisfennica.journal.fi/article/view/132822. Acesso em: 14 sep. 2024.