Cambridge Information and Research Services, Comp. <br/><br/>
World directory of energy information.3V. 
Cambridge Information and Research Services, Comp. 
 -  1981 
<br/><br/><label>Standard No.: </label>71994 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>X9(F555)K1,N81, M1.1-.3  RR