Homo sapiens : de animal a semideus / Bernhard Rensch; trad. Emílio Campos Lima
Sistemas de circuitos binarios / Klaus Heim e Klaus Schôffel; Siemens Aktiengesellschaft
Metric System with English Equivalents : Interspersed with comparative tables and explanatory remarks / Frederic A. Crichton
Cours d'électrotechnique générale / Ch. Suchet