HILL, Cecelia L. Bird Migrants and Visitors in April. Blue Jay, [S. l.], v. 10, n. 2, 1952. DOI: 10.29173/bluejay1387. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/1387. Acesso em: 5 dec. 2025.