TY  - BOOK
AU  - Allen,Milton Arthur
AU  - Butler,G.M.
TI  - Manganese,
T2  - Arizona. State bureau of mines. Bulletin
AV  - TN490.M3 A4
PY  - 1918///]
CY  - Tucson, Ariz.
PB  - University of Arizona, Bureau of mines
KW  - Manganese
KW  - Manganese ores
N1  - Cover title; At head of title: ... University of Arizona bulletin; "References": p. 32
ER  -