Dyni, John R. <br/><br/>
Relation of the carbon/oxygen ratio in coal to igneous intrusions in the Somerset coal field, Colorado / 
by John R. Dyni and David L. Gaskill 
 - Washington :  U.S. Govt. Print. Off.,  1980 
 - iv, 20 p. :  ill., [1] fold. map (in pocket) ;  23 cm. 
 - Contributions to geochemistry Geological Survey bulletin ;  no.1477-A .
<br/><br/>Bibliography : p. 18-20 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal--Analysis--Colorado
<br/><br/><label>Dewey Class. No.: </label>662.622978841