George, Russell D.,  1866- <br/><br/>
Common minerals and rocks,  their occurrence and uses, 
by R. D. George. 
 - Denver, Col.,  The Smith-Brooks printing co.,  1913. 
 - 406 p.  illus.  24 cm. 
 - Colorado. Geological survey. Bulletin 6 .
<br/><br/><label>LCCN: </label>gs 13000440  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineralogy--Colorado.<br/>Petrology--Colorado.
<br/><br/><label>LC Class. No.: </label>QE91  / .A4 no. 6