TY  - BOOK
AU  - Lee,Willis T.
TI  - Coal fields of Grand Mesa and the West Elk Mountains, Colorado,
T2  - U.S. Geological survey. Bulletin 510
AV  - QE75 .B9 no. 510
PY  - 1912///
CY  - Washington
PB  - Government print. off.
KW  - Coal mines and mining
KW  - Colorado
KW  - Coal
N1  - At head of title: Department of the Interior; Title vignette
ER  -