TY  - BOOK
AU  - UNITED STATES DEPARTEMENT OF THE INTERIOR
TI  - YEARBOOK MINERALS
T2  - 0
U1  - 050.549 
PY  - 1953///
CY  - WASHIGTON
PB  - BEREAU OF MINES
KW  - OBRAS GENERALES
N1  - YEARBOOK-MINERALS/1950
ER  -