TY  - BOOK
AU  - UNITED STATES DEPATMENT OF THE INTERIOR
TI  - MINERALS YEARBOOK 1940
T2  - 0
U1  - 050.549 
PY  - 1940///
CY  - WASHINGTON-USA
PB  - U.S.GOVERNM.PRINT.OFFICE
KW  - OBRAS GENERALES
N1  - ESTADISTICA-PRODUCCION MINERALES/NO METALES
ER  -