HOUSTON, M. I.; HOUSTON, C. Stuart. Prairie Christmas Bird Counts, 1906-1941. Blue Jay, [S. l.], v. 34, n. 4, 1970. DOI: 10.29173/bluejay3876. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/3876. Acesso em: 7 may. 2024.