01375cam a22003611 4500 gs 39000041 DLC 20260227111344.0 760226s1937 azu s001 0 eng gs 39000041 (OCoLC)2016119 DLC AzFU OCoLC DLC premarc TN421 .A7 1937 MN 1.3:B 85/142 azdocs University of Arizona. State Bureau of Mines Arizona gold placers and placering (4th ed., reprinted 1937) Tucson, Ariz., University of Arizona [1937] 148 p. illus. 23 cm. Its bulletin no. 142; Mineral technology series no. 38 University of Arizizona bulletin, v. 8, no. 2. Reprint of Bulletin no. 135. Part I, based partly on Arizona gold placers by M. A. Allen, appeared in 1922 as Bulletin no. 118. Bibliography: p. 123-124. Gold mines and mining Arizona. Prospecting. Mining law Arizona. Allen, Milton Arthur, 1890- Bulletin (University of Arizona) ; v. 8, no. 2. University of Arizona. State Bureau of Mines. Bulletin ; no. 142. University of Arizona. State Bureau of Mines. Mineral technology series ; no. 38. 27510 27510