Manganese,
Allen, Milton Arthur, 1890- .
Manganese, by M. A. Allen and G. M. Butler. - Tucson, Ariz., University of Arizona, Bureau of mines [1918] - 32 p. 23 cm. - Arizona. State bureau of mines. Bulletin no. 91. Mineral technology series, no. 19 .
Cover title. At head of title: ... University of Arizona bulletin.
"References": p. 32.
gs 18000313
Manganese.
Manganese ores.
TN490.M3 / A4
MN 1.3:B 85/91
Manganese, by M. A. Allen and G. M. Butler. - Tucson, Ariz., University of Arizona, Bureau of mines [1918] - 32 p. 23 cm. - Arizona. State bureau of mines. Bulletin no. 91. Mineral technology series, no. 19 .
Cover title. At head of title: ... University of Arizona bulletin.
"References": p. 32.
gs 18000313
Manganese.
Manganese ores.
TN490.M3 / A4
MN 1.3:B 85/91