BERGMAN, G. On the irruption of Great Spotted Woodpeckers in 1962: some corrections and remarks. Ornis Fennica, [S. l.], v. 48, n. 3–4, p. 138–139, 1971. Disponível em: https://ornisfennica.journal.fi/article/view/132827. Acesso em: 17 touko. 2024.