Gupta, Harsh. , Geothermal energy : an alternative resource for the 21st century / Harsh Gupta, Sukanta Roy. - xii, 279 pages : illustrations ; 25 cm. ISBN: 9780444528759 044452875X Subjects--Topical Terms: Geothermal engineering.Geothermal resources. LC Class. No.: TJ280.7 / .G86 2007