TY  - BOOK
AU  - George,Russell D.
TI  - Oil shales of Colorado,
AV  - QE91 .A4 no. 25
PY  - 1921///
CY  - Denver, Col.
PB  - Eames brothers, state printers
KW  - Petroleum
KW  - Colorado
N1  - At head of title: Colorado Geological Survey, Boulder. R. D. George, state geologist; Bibliography: p. 73-76
ER  -