SEALY, Spencer G. Egg Shell Fragments From Old Nests as a Possible Source of Calcium for Nesting Songbirds. Blue Jay, [S. l.], v. 75, n. 4, p. 12–14, 2017. DOI: 10.29173/bluejay14. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/14. Acesso em: 14 jun. 2024.