História da aeronáutica / Courtlandt Canby; trad. Jorge Peixoto
The education of physicists for work in industry : proceedings of an international seminar held at Eindhoven, The Netherlands, 2-6 December 1968 / G. Diemer; J. H. Emck
Um povo miúdo : as abelhas / Eduardo Sousa de Almeida
A vida e os seus problemas / Jean Rostand; trad. Armindo Rodrigues