MARJAKANGAS, A.; MARJAKANGAS, A. A "gang" brood of two Black Grouse Tetrao tetrix hens. Ornis Fennica, [S. l.], v. 66, n. 2, p. 79–80, 1989. Disponível em: https://ornisfennica.journal.fi/article/view/133281. Acesso em: 22 nov. 2024.