Interim report on energy use patterns in metallurgical and nonmetallic mineral processing  (phase 4--energy data and flowsheets, high-priority commodities) 
U.S. Bureau of mines 
 - Columbus, Ohio  Battelle Columbus Laboratories  1975 
 - viii, l82 p.  28 cm 
 - OFR  80-75 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>energía<br/>consumo<br/>mina<br/>recurso minero
<br/><br/><label>Universal Decimal Class. No.: </label>669