Harak, Arnold E. <br/><br/>
Oil shale retorting in a 150-ton batch-type pilot plant 
Harak, Arnold E. 
 - Washington  Bureau of mines  1974 
 - 31 p. 
 - RI 7995 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>MINING
<br/><br/><label>Subjects--Index Terms: </label>ACEITES DE ESQUISTO REFINACION ACEITE DE PIZARRA SHALE OILS REFINING OIL-SHALES 
<br/><br/><label>Universal Decimal Class. No.: </label>622