improved techniques for the extraction of primary forms of energy   
/ A Seminar of the United Nations Economics Commission for Europe (Vienna 10-14 November 1980)     
 - Graham:   Co-Operation with the United Nation,  
 - vii, 194p. 
<br/><br/><label>ISBN: </label>0-860100-439-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemical technology
<br/><br/><label>Subjects--Index Terms: </label>Fossil fuels  Hydrocarbons  
<br/><br/><label>Universal Decimal Class. No.: </label>662.6/.7(082.2)   / M3