A Comparative Study of Bird Populations in Illinois, 1906-1909 and 1956-1958. Illinois Natural History Survey Bulletin, Champaign, IL, v. 28, n. 1-3, p. 383–528, 1963. DOI: 10.21900/j.inhs.v28.169. Disponível em: https://iopn.library.illinois.edu/journals/inhs/article/view/169.. Acesso em: 19 may. 2024.