00866cam a22002651 4500 gs 54000317 DLC 20260227111402.0 800405s1954 azua s000 0 eng gs 54000317 (OCoLC)6170013 DLC TxCM OCoLC DLC premarc TN153 .K7 MN 1.3:B 85/164 azdocs Krumlauf, Harry Eugene, 1901- Exploration and development of small mines. Tucson, University of Arizona, 1954. 34 p. illus., tables. Arizona. [State] Bureau of Mines. Bulletin no. 164 Mineral technology series, no. 48 University of Arizona bulletin, v. 25, no. 1 Mining engineering. University of Arizona. State Bureau of Mines. Bulletin ; 164. 28913 28913