University of Illinois Urbana-Champaign

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Showing 8881–8910 of 15,765 items
Thumbnail for Availability of the Danville, Jamestown, Dekoven, Davis, and Seelyville coals for mining in selected areas of Illinois
Availability of the Danville, Jamestown, Dekoven, Davis, and Seelyville coals for mining in selected areas of Illinois
Korose, Christopher P.; Treworgy, Colin G.; Jacobson, Russell J.; Elrick, Scott D.

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.