Proceedings of the United Nations Conference on New Sources of Energy : solar energy, wind power and geothermal energy, Rome, 21-31 August 1961, vol. 3 ; geothrmal energy : II = Actes officiels de la Conférence des Nations Unies sur les sources nouvelles d'énergie : énergie solaire, énergie éolienne et énergie géothermique, Rome, 21-31 aout 1961 vol. 3 ; energie geothermique : II / New sources of energy. United Nations Conference on New Sources of Energy (1961 : Rome, Italy) Power (Mechanics) Congresses. Power resources Congresses. 531 UNN "E/Conf.35/2--E/Conf.35/8." "United Nations publication. Sales no.:63.I.2; [63.I.36--63.I.4l]" Cover title: New sources of energy. Includes bibliographies. New York : United Nations, 1964. 1964. 1963 Text ix, 516 p. : eng engfre