JONASSON, H. On the invasion of the Two-barred Crosbill (Loxia leucoptera bifasciata) 1956–1957. Ornis Fennica, [S. l.], v. 37, n. 1–2, p. 46–51, 1960. Disponível em: https://ornisfennica.journal.fi/article/view/132649. Acesso em: 23 nov. 2024.