Matter and light : the new physics / Louis de Broglie; trad. W. H. Johnston
TP 2000 : a projection on to the year 2000 compiled by the Ministry of Transport and Public Works of the Netherlands / Ministry of Transport and Public Works
O homem e o mundo biológico / J. Speed Rogers, Theodore H. Hubbell, C. Francis Byers; trad. Doutor João Tendeiro
Viver sem petróleo / J. A. Grégoire; tradução de M. de Campos