University of Illinois Urbana-Champaign

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Showing 631–660 of 19,925 items
Thumbnail for Geology of the fluorspar deposits of Illinois
Geology of the fluorspar deposits of Illinois
Weller, James Marvin; Grogan, Robert Mann; Tippie, Frank Emerson, joint author

Thumbnail for The mineral content of Illinois waters
The mineral content of Illinois waters
Bartow, Edward; Parr, Samuel Wilson; Palmer, George Thomas; Udden, Johan August