JENSEN, Ron. Feeding Peanut Butter to Birds in Winter. Blue Jay, [S. l.], v. 75, n. 4, p. 5, 2017. DOI: 10.29173/bluejay13. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/13. Acesso em: 21 jun. 2024.