Averitt, Paul  1908-1991 <br/><br/>
Coal reserves of the United States : a progress report January 1, 1960 / 
by Paul Averitt. 
 -- Washington :   United States Government Printing Office,   1961 
 - 116 p. -- 
 (Geological Survey Bulletin  ; 1136).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Carbón<br/>Estados Unidos
<br/><br/><label>Universal Decimal Class. No.: </label>552.574(73)