Solar energy, wind power and geothermal energy = Énergie solaire, énergie éolienne et énergie géothermique /
United Nations Conference on New Sources of Energy(1961 :Rome, Italy)
Calder, Ritchie,1906-1982,former owner.StEdNL
United Nations.
Includes index.
"Conference working papaer only = Document de travail destiné uniquement à la Conférence."