University of Illinois Urbana-Champaign

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Showing 391–420 of 597 items
Thumbnail for Development and Expansion of the Natural Resource Data and Information Systems in
            Support of the Illinois Comprehensive Wildlife Conservation Plan
Development and Expansion of the Natural Resource Data and Information Systems in Support of the Illinois Comprehensive Wildlife Conservation Plan
Walk, Jeff; Phillips, Christopher A.; Hinz, Leon C., Jr.; Tweddale, Tari; Szafoni, Diane; Cordle, Liane; Holtrop, Ann Marie; Bol, Leslie; Brown, Patrick W.; Heske, Edward J.; Thomas, David; Epifanio, John M.

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.