TY  - BOOK
AU  - Olson,Jerry Chipman
TI  - Rare-earth mineral deposits of the Mountain Pass district, San Bernardino County, California,
AV  - TN490.A2 O55
U1  - 553.49 
PY  - 1954///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Rare earths
KW  - Geology
KW  - California
KW  - San Bernardino County
KW  - Mines and mineral resources
KW  - History
N1  - Part of the illustrative matter folded in pocket; Bibliography: p. 64-65
ER  -