01115cam a22003011 4500 gs 21000265 DLC 20260227111325.0 760218s1921 azua s000 0 eng gs 21000265 (OCoLC)1999123 DLC AzFU OCoLC DLC premarc TN930 .A5 MN 1.3:B 85/113 azdocs Allen, Milton Arthur, 1890- Asbestos, by M. A. Allen and G. M. Butler. Tucson, Ariz., University of Arizona, Arizona bureau of mines, 1921. 31 p. illus. (map) pl. 23 cm. Arizona. Bureau of mines, Bulletin no. 113 Mineral technology series no. 24 At head of title: University of Arizona bulletin. Selected bibliography: p.30-31. Asbestos. Butler, G. M. (Gurdon Montague), 1881- joint author. University of Arizona. State Bureau of Mines. Bulletin ; no. 113. University of Arizona. State Bureau of Mines. Mineral technology series ; no. 24. 26103 26103