Averitt, Paul  1908-1991 <br/><br/>
Stripping-Coa Resources f the United States, jaunary1, 1970 / 
By Paul Averitt. 
 -- Washington :   United States Governement printing Office,   1970 
 - 34 p. -- 
 (Geological Survey Bulletin  ; 1322).
<br/><br/> Fecha real de registro 15-03-1971 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Carbón
<br/><br/><label>Universal Decimal Class. No.: </label>553.9