George, Russell D.,  1866- <br/><br/>
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. 
<br/><br/> At head of title: Colorado Geological Survey, Boulder. R. D. George, state geologist. 
<br/><br/>Bibliography: p. 73-76. 
<br/><br/><label>LCCN: </label>gs 21000320  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroleum--Colorado.
<br/><br/><label>LC Class. No.: </label>QE91  / .A4 no. 25