University of Illinois Urbana-Champaign

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Showing 6511–6540 of 10,835 items
Thumbnail for Geochemical and petrographic analysis of the Sparks Hill Diatreme and its relationship to the Illinois-Kentucky fluorspar district
Geochemical and petrographic analysis of the Sparks Hill Diatreme and its relationship to the Illinois-Kentucky fluorspar district
Denny, F. Brett; Maria, Anton H.; Mulvaney-Norris, Joseph L.; Guillemette, Renald N.; Cahill, Richard A.; Fifarek, Richard H.; Freiburg, Jared T.; Anderson, Warren, H.

Thumbnail for Fluorspar in Illinois
Fluorspar in Illinois
Bradbury, James C.; Major, Robert L.; Finger, G.C.

Thumbnail for Special to farm advisers / 1950
Special to farm advisers / 1950
Submitter: Howard Ding