Trägerfrequenz-einrichtungen für fernsprechleitungen / Siemens & Halske AG
The benefits of completing the internal market for telecommunication equipment [and] services in the Community / Jürgen Müller; Commission of the European Communities
Visual telephone service / L M Ericsson
The system of to-day and to-morrow : Pamphlet No. M.E.M.I. -1 / Marconi - E.M.I. Television