University of Illinois Urbana-Champaign

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Showing 1291–1320 of 3,976 items
Thumbnail for Effect of fluorspar on silicate melts with special reference to mineral wool,
Effect of fluorspar on silicate melts with special reference to mineral wool,
Machin, James Stewart; Vaneck, James Franklin joint author

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.