"The study of 54 items concerning 109 countries shows that the development of the communication media is closely linked to several aspects of the country's development and that the process of national development shows correlations between these variables." (Jean-Marie Van Bol, Abdelfattah Fakhfakh: The use of mass media in the developing countries. Brussels: CIDESA, 1971 Nr. 796, topic code 04, 072.0)