Some facts about ore deposits Butler, G. M. (Gurdon Montague) 1881- creator text azu Tucson, Ariz University of Arizona [1935] 1935 monographic eng
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99 p. 23 cm. by G. Montague Butler. Selected bibliography: p. 99. Ore deposits TN24.A6 A35 no. 139 MN 1.3:B 85/139 MN 1.3:B 85/139 Bulletin ; no. 139 University of Arizona. State Bureau of Mines. Geology series ; no. 8 University of Arizona. State Bureau of Mines. Bulletin (University of Arizona) ; v. 6, no. 6 gs 35000278 DLC 760224 20260227111340.0 gs 35000278