O sector energético metropolitano : combustíveis / Direcção Geral dos Combustíveis
The Eighth World Energy Conference
Estadistica general de produccion, importacion y distribucion directa de carbones minerales, 1965. / de, Calidades de Servicio de
Grande Dixence
The coal industry in Europe : the situation in 1958 and 1959 and outlook on future trends / Organisation for European Economic Co-Operation.
Ensayo renn con minerales de hierro y carbones portugueses / Luiz de Castro e Solla, J. L. Guimarães dos Santos
Le choix des investissements : critères et méthodes. finance et économie appliquée / Pierre Massé
The Transactions of the Canadian Sectyional Meeting of the World Power Conference - Vol.3
Les pools et l'économie électrique européenne
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
Minas - riqueza da terra - águas / António José Alves de Souza
Carvão Vegetal para Alto-Forno : Alguns Dados Nacionais e Estrangeiros / Jayme Benedito Araûjo