Elder, John, 1933- <br/><br/>
Geothermal systems / 
John Elder 
 - London  :  Academic Press,  1981 
 - 508  p.  :  ill.  ;  24  cm. 
<br/><br/> Includes index 
<br/><br/>Bibliography : p.495-502 
<br/><br/><label>ISBN: </label>0122364503 
<br/><br/><label>LCCN: </label>80-49663 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geothermal resources