Oil shales of Colorado,
George, Russell D., 1866-
Oil shales of Colorado, by R. D. George. - Denver, Col., Eames brothers, state printers, 1921. - 78 p. incl. illus., tables., 2 fold. maps in pocket. 23 cm.
At head of title: Colorado Geological Survey, Boulder. R. D. George, state geologist.
Bibliography: p. 73-76.
gs 21000320
Petroleum--Colorado.
QE91 / .A4 no. 25
Oil shales of Colorado, by R. D. George. - Denver, Col., Eames brothers, state printers, 1921. - 78 p. incl. illus., tables., 2 fold. maps in pocket. 23 cm.
At head of title: Colorado Geological Survey, Boulder. R. D. George, state geologist.
Bibliography: p. 73-76.
gs 21000320
Petroleum--Colorado.
QE91 / .A4 no. 25