TY  - BOOK
AU  - UNITED STATES DEPARTAMENT OF THE INTERIOR
TI  - YEARBOOK MINERALS
T2  - 0
U1  - 050.549 
PY  - 1978///
CY  - WASHINGTON
PB  - BEREAU OF MINES
KW  - OBRAS GENERALES
N1  - YEARBOOK-MINERALS/1975
ER  -