University of Illinois Urbana-Champaign

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Showing 931–960 of 1,197 items
Thumbnail for A directory of Illinois systematists and ecologists
A directory of Illinois systematists and ecologists
Robertson, Kenneth R.; Burton, Phillip J. K.; McKnight, Bill N.

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.