Armstead, H. Christopher H. <br/><br/>
Heat mining :  a new source of energy / 
H. Christopher H. Armstead and Jefferson W. Tester 
 - London :  E & FN Spon,  1987 
 - 478 p. :  ill. ;  26 cm. 
<br/><br/><label>ISBN: </label>0419122303 
<br/><br/><label>LCCN: </label>87-5986 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Energy minerals<br/>Earth temperature<br/>Heat engineering