Coal conversion 

 - Washington, D.C. :  United States Government Printing Office,  1978 
 - 129 p. ;  25 cm. 
 - 1977 Technical Report .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal conversion<br/>Coal mining
<br/><br/><label>Dewey Class. No.: </label>553.24