Armstead, H. Christopher H. <br/><br/>
Geothermal energy:  its past, present, and future contributions to the energy needs of man / 
H. Christopher H. Armstead. 
 - London :  E & FN Spon,  1978. 
 - xxvii, 357 p. :  ill ;  24 cm 
<br/><br/> 'A Halsted Press book.'  Includes index and bibliography : p.  332 -340. 
<br/><br/><label>ISBN: </label>0470263377 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geothermal engineering.<br/>Geothermal resources.