University of Illinois Urbana-Champaign

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Showing 1741–1770 of 2,889 items
Thumbnail for Sex Ratios and Age Ratios in North American Ducks
Sex Ratios and Age Ratios in North American Ducks
Bellrose, Frank Chapman; Scott, Thomas G.; Hawkins, Arthur Stuart; Low, Jessop B.

Thumbnail for Illinois Technograph v. 059 (1944-1945)
Illinois Technograph v. 059 (1944-1945)
Submitter: Timothy Donohue