"The development of radio services in the developing countries may be assisted and accelerated by utilising wired radio systems in addition to the conventional methods — The experiment carried out in Lagos, Nigeria, in 1952 — Technical aspects of the wired system of radio. [Working Paper. Contribution to: The United Nations Conference on the Application of Science and Technology for the Benefit of the Less Developed Areas, Geneva, 4 to 20 February 1963. E/Conf. 39/L/46. Agenda Item: L.2.2]" (Jean-Marie Van Bol, Abdelfattah Fakhfakh: The use of mass media in the developing countries. Brussels: CIDESA, 1971 Nr. 1744, topic code 231)