New systems and services in telecommunications : proceedings of the International Conference on New Systems and Services in Telecommunications, Liege, Belgium, November 24-26, 1980 - International Conference on New Systems and Services in Telecommunications (1980 : Liege, Belgium).; Cantraine, G. (Guy), 1934-.; Destine, J. (Jacques), 1949-. (Amsterdam : North-Holland, 1981)
Keywords: Telecommunication -- Congresses