TY  - BOOK
ED  - BUREAU OF MINES
TI  - MINERAL FACTS AND PROBLEMS
U1  - H 
PY  - 1956///
CY  - Washington
PB  - United States Government Printing Office
KW  -  MINERALS INDUSTRIES
KW  -  MINES AND MINERAL RESOURCES-U. S.
KW  - GEOLOGY
ER  -