Proceedings of the Second International Seminar on the Results of EC Geothermal Energy Research, held in Strasbourg, 4-6 March 1980 ; edited by A.S. Strub and P. Ungemach - Strub, A.S. (Albert S.); Ungemach, P., 1939- (D. Reidel Pub. Co. distributed in the U.S.A. by Kluwer Boston, 1980)