"Importance of sociological research for the developing countries, shown through the example of a study of the working of the "Farm Radio Forums in the Spring of 1959 — Methods and application of the survey in 20 of the 150 villages and in 20 "control" villages — Positive results have led to a development of this form of adult education." (Jean-Marie Van Bol, Abdelfattah Fakhfakh: The use of mass media in the developing countries. Brussels: CIDESA, 1971 Nr. 1598, topic code 04, 261)