Wahl, Edward F <br/><br/>
Geometrical energy utilization 

 - New York  John - Wiley  1977 
 - 302p. 
<br/><br/><label>ISBN: </label>0471023043 
<br/><br/><label>Subjects--Index Terms: </label>Geothermal energy  Geothermal engineering 
<br/><br/><label>Universal Decimal Class. No.: </label>662.997  / WAH