University of Illinois Urbana-Champaign

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Showing 301–330 of 1,200 items
Thumbnail for Petroleum industry in Illinois, 1959
Petroleum industry in Illinois, 1959
Bell, Alfred Hannam; Mast, Richard F.; Oros, Margaret O.; Sherman, Carl W.; Van Den Berg, Jacob

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.