Parker, Raymond L. <br/><br/>
Mafic-ultramafic igneous rocks and associated carbonatites of the Gem park complex, Custer and Fremont counties, Colorado / 
by Raymond L. Parker and William N. Sharp. 
 -- Washington :   United States Government Printing Office,   1970 
 - 24 p. + map. -- 
 (Geological Survey Professional Paper  ; 649).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Colorado<br/>Rocas ígneas
<br/><br/><label>Universal Decimal Class. No.: </label>552.3(788)