KOIVUSAARI, J.; NUUJA, I.; PALOKANGAS, R.; VIHKO, V. Decrease in eggshell thickness of the Wite-tailed Eagle in Finland during 1884–1971. Ornis Fennica, [S. l.], v. 49, n. 1, p. 11–13, 1972. Disponível em: https://ornisfennica.journal.fi/article/view/132830. Acesso em: 19 may. 2024.