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Duffield, Wendell A.

Tapping the earth’s natural heat / by Wendell A. Duffield, John H. Sass and Michael L. Sorey. - [Washington]: [United States Government Printing Office], [1994]. - 63 p. : ill., maps ; 28 cm. - 1125 .

Includes bibliographical references (p. 56-57).

ISBN:

Subjects--Topical Terms:
Geothermal resources

Dewey Class. No.: 333.88