Gelb, Bernard A. <br/><br/>
Energy use in mining: patterns and prospects 

 - Cambridge, MA  Ballinger Publishing Company  1979 
 - 215 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CONSUMO DE ENERGIA<br/>MINERIA
<br/><br/><label>Universal Decimal Class. No.: </label>622.005:621.3/G35