Wahl, Edward F. <br/><br/>
Geothermal energy utilization   
by Edward F. Wahl 
 - New York  John Wiley & sons  1977 
 - xiv, 302p. 
<br/><br/><label>ISBN: </label>0471023043 
<br/><br/><label>Dewey Class. No.: </label>621.4  / N772