Sixth World Power Conference / Conference World Power
Neuvieme assemblee generale / Association Internationale de Recherches Hydrauliques
Conditions de création et dévelopment de l'industrie nucléaire européenne
Septième Congrès International des Grands Barrages
Sobre a utilização em Portugal de centrais nucleares na produção de energia eléctrica / José Pires Lourenço
New sources of energy and energy development.
Sources nouvelles d'énergie et production d'énergie
United Nations conference on the applications of science and technology for the benefit of the less developed areas