SAMMALISTO, L. Talvilaskennat 1981–82 / Winter censuses in 1981–82. Ornis Fennica, [S. l.], v. 59, n. 4, p. 183–190, 1982. Disponível em: https://ornisfennica.journal.fi/article/view/133111. Acesso em: 23 nov. 2024.