Duffield, Wendell A. <br/><br/>
Tapping the earth's natural heat 
by Wendell A. Duffield, John H. Sass, and Michael L. Sorey. 
 - Washington  U.S. G.P.O.  1994. 
 - 63 p.  ill. (some col.), col. maps  28 cm. 
 - U.S. Geological Survey circular  Public issues in earth sciences  1125. .
 - U.S. Geological Survey circular  1125. U.S. Geological Survey circular.  Public issues in earth science. .
<br/><br/>Includes bibliographical references (p. 56-57). 
<br/><br/><label>LCCN: </label>94027386 //r94 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geothermal resources
<br/><br/><label>LC Class. No.: </label>GB1199.5  / .D84 1994 
<br/><br/><label>Dewey Class. No.: </label>333.8/8 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.412:1125