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14.		The Eighth World Energy Conference
15.		Estadistica general de produccion, importacion y distribucion directa de carbones minerales, 1965. / de, Calidades de Servicio de Autor: Servicio de, Calidades de
16.		Grande Dixence
17.		The coal industry in Europe : the situation in 1958 and 1959 and outlook on future trends / Organisation for European Economic Co-Operation.
18.		Ensayo renn con minerales de hierro y carbones portugueses / Luiz de Castro e Solla, J. L. Guimarães dos Santos Autor: SOLLA, Luiz de Castro e
19.		Le choix des investissements : critères et méthodes. finance et économie appliquée / Pierre Massé Autor: Massé, Pierre
20.		The Transactions of the Canadian Sectyional Meeting of the World Power Conference - Vol.3
21.		Les pools et l'économie électrique européenne
22.		Burton Investigation Group Report on the relationship between the Chlorine Content of the Coal Burned and the Availability of a stoker fired boiler / Boiler Availability Committee
23.		Minas - riqueza da terra - águas / António José Alves de Souza Autor: Souza, António José Alves de
24.		Carvão Vegetal para Alto-Forno : Alguns Dados Nacionais e Estrangeiros / Jayme Benedito Araûjo Autor: Araûjo, Jayme Benedito