Sheridan, Douglas M.,  1921- <br/><br/>
Rutile and topaz in Precambrian gneiss,  Jefferson and Clear Creek Counties, Colorado, 
by Douglas M. Sheridan, Richard B. Taylor, and Sherman P. Marsh. 
 - Washington,  1968. 
 - iii, 7 p.  illus., map.  26 cm. 
 - Geological Survey circular 567 .
 - Geological Survey circular ;  567. .
<br/><br/><label>LCCN: </label>gs 68000264 //r935 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rutile--Colorado--Jefferson County.<br/>Rutile--Colorado--Clear Creek County.<br/>Topaz--Colorado--Jefferson County.<br/>Topaz--Colorado--Clear Creek County.<br/>Gneiss--Colorado--Jefferson County.<br/>Gneiss--Colorado--Clear Creek County.<br/>Geology, Stratigraphic--Precambrian.
<br/><br/><label>LC Class. No.: </label>QE75  / .C5 no. 567 
<br/><br/><label>Dewey Class. No.: </label>549.5/24