Waterfowl Populations and the Changing Environment of the Illinois River Valley. Illinois Natural History Survey Bulletin, Champaign, IL, v. 32, n. 1-4, p. 1–54, 1979. DOI: 10.21900/j.inhs.v32.141. Disponível em: https://iopn.library.illinois.edu/journals/inhs/article/view/141.. Acesso em: 11 may. 2024.