
25.		Alphacoustic [Catálogos]
26.		Chance . Transmission and distribution products : Indexes for Chance catalogs
27.		Protecção - Disjuntor Data: [s.d.]
28.		Merlin Gerin. Catalogue
29.		Aspectos gerais da protecção contra radiações / António Ferro de Carvalho Autor: Carvalho, António Ferro de Data: Set-Out 1978
30.		Manual de instalações eléctricas / Otto Guthmann Autor: Guthmann, Otto
31.		Made. [Catálogo] Data: 1969 - 1978
32.		Relais statiques de protection des moteurs types ITX162, ITX163 : CH-ES 63-31.1F
33.		Klöckner-Moeller. The protection of wires and cables against short circuits / Heinz Wierny Autor: Wierny, Heinz
34.		Klöckner-Moeller. Selekyivität in niederspannungs-strahletnnetzen
35.		Brown Boveri. Directional power relays type PM : Relays and Protection Schemes- CH- ES 61-51.1 E / Brown Boveri
36.		Brown Boveri. Static relay for the protection of motors types ITX 162, ITX163 : Relays and Protection Schemes- CH- ES 61-31.1 E / Brown Boveri