TY  - BOOK
AU  - Butler,B.S..
AU  - Dunlop,J.P.
TI  - Silver, Cooper, Lead, and Zinc in the central States in 1913 : : Mines Report
PY  - 1914///
CY  - Washington, D.C.
PB  - Government Printing Office
KW  - MINERIA
N1  - Impreso; En biblioteca 2 ejemplares
ER  -