Bitler, John R. <br/><br/>
Computer graphics demonstration area coal availability studies 
Bitler, John R. 
 - Washington  Bureau of mines  1977 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>PROGRAMA DE COMPUTADORA
<br/><br/><label>Universal Decimal Class. No.: </label>622:004