HARPER, T.A. Sandhil Cranes and the Future. Blue Jay, [S. l.], v. 17, n. 4, 1959. DOI: 10.29173/bluejay2141. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/2141. Acesso em: 4 dec. 2025.