TY  - BOOK
AU  - Lovering,T.S.
AU  - Tweto,Ogden
TI  - Geology and ore deposits of the Boulder County tungsten district, Colorado,
AV  - QE75 .P9 no. 245
U1  - 553.46 
PY  - 1953///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Geology
KW  - Colorado
KW  - Boulder County
KW  - Petrology
KW  - Tungsten ores
KW  - Tungsten mines and mining
N1  - Part of the illustrative material is folded, part colored, part in pocket; "List of references": p. 192-196
ER  -