Steven, Thomas August,  1917- <br/><br/>
Geology and ore deposits of the Summitville district, San Juan Mountains, Colorado, 
by Thomas A. Steven and James C. Ratté. 
 - Washington,  U.S. Govt. Print. Off.,  1960. 
 - iv, 70 p.  illus., maps (part col.)  30 cm. 
<br/><br/> Part of illustrative matter fold. in pocket.  "Prepared in cooperation with the Colorado Metal Mining Fund Board." 
<br/><br/>Bibliography : p. 66-67. 
<br/><br/><label>LCCN: </label>gs 60000292  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Colorado.<br/>Petrology--Colorado.<br/>Ore deposits--Colorado.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>San Juan Mountains (Colo. and N.M.)
<br/><br/><label>LC Class. No.: </label>QE75  / .P9 no. 343 
<br/><br/><label>Dewey Class. No.: </label>557.883 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.16:343