BITTNER, Ronald A. Bluebird Nestboxes: Unusual Designs. Blue Jay, [S. l.], v. 51, n. 1, 1993. DOI: 10.29173/bluejay5336. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/5336. Acesso em: 18 may. 2024.