HAARTMAN, L. Geographical Variations in the Clutch-size of the Pied Flycatcher. Ornis Fennica, [S. l.], v. 44, n. 4, p. 89–98, 1967. Disponível em: https://ornisfennica.journal.fi/article/view/132733. Acesso em: 23 nov. 2024.