01001cam a22002891 4500 gs 19000411 DLC 20260227111324.0 800403s1919 azua b s000 0 eng gs 19000411 (OCoLC)6161753 DLC TxCM OCoLC DLC premarc TN948.B18 A4 MN 1.3:B 85/99 azdocs Allen, Milton Arthur, 1890- Barytes, by M. A. Allen and G. M. Butler. Tucson, Ariz., University of Arizona, Bureau of Mines [1919] 18 p. illus. Arizona. Bureau of Mines. Bulletin no. 99. Mineral technology series, no. 22 Cover title. At head of title: University of Arizona bulletin ... "Selected bibliography": p. 17-18. Barite. Butler, G. M. (Gurdon Montague), 1881- joint author. University of Arizona. State Bureau of Mines. Bulletin ; 99. 25962 25962