00959cam a22002771 4500 gs 20000433 DLC 20260227111325.0 760412s1920 xx 000 0 eng gs 20000433 (OCoLC)2107140 DLC TxEU DLC premarc QE91 .A4 no. 18 Aurand, Harry A. Fluorspar deposits of Colorado, by Harry A. Aurand. Denver, Col., Eames brothers, state printers, 1920. 94 p. incl. illus., map., tab., diagr. 23 cm. Colorado Geological Survey. Bulletin, 18 At head of title: Colorado Geological survey, Boulder... "Bibliography of Colorado fluorspar": p. 87-88. "Bibliography of fluorspar in the United States": p. 89-91. Bibliographical footnotes. Mines and mineral resources Colorado. Fluorspar. 26050 26050