Geology and Thorium deposits of the wet mountains, Colorado a progress report / 
by R. A. Christman...[et al.]. 
 -- Washington :   United States Government Printing Office,   1959 
 - P. 491-533 + map. -- 
 (Geological Survey Bulletin  ;  1072-H).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Colorado<br/>Yacimientos de Torio
<br/><br/><label>Universal Decimal Class. No.: </label>553.493.6(788)