Geothermal energy : review of research and development / edited by H. Christopher H. Armstead. - Paris : Unesco, 1973. - 186p : ill. ; 27 cm. - Earth sciences. . Includes bibliographical references. ISBN: 9231010638 Subjects--Topical Terms: Geothermal engineering--Congresses.Steam power--plants--Congresses.Geothermal resources--Congresses.