Christensen John W. <br/><br/>
Global Science / Energy Resources Environment / 

 - 3rd 
 - Dubuque  Kendall/ Hunt Publishing Company  1981 
 - 699p 
<br/><br/><label>ISBN: </label>0840346573 
<br/><br/><label>LCCN: </label>nam a22     7a 4500 
<br/><br/><label>Dewey Class. No.: </label>333.7/GHR/1981