Energy source book  

 - USA:   Aspen Systems Corporation,   1977 
 - 724p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Energy 
<br/><br/><label>Subjects--Index Terms: </label>Source  
<br/><br/><label>Universal Decimal Class. No.: </label>R 620.91(73)  / L7