TY  - BOOK
AU  - Butler,G.M.
TI  - Some facts about ore deposits,
T2  - Arizona. Bureau of Mines. Bulletin
AV  - TN24.A6 A35 no. 139
PY  - 1935///]
CY  - Tucson, Ariz.
PB  - University of Arizona
KW  - Ore deposits
N1  - Selected bibliography: p. 99
ER  -