"Report on a three-years experiment carried out in Kenya under the auspices of the Kenya Community Development Department — The author concludes that the use of audio-visual aids is of .great value in the education of people of a low cultural level." (Jean-Marie Van Bol, Abdelfattah Fakhfakh: The use of mass media in the developing countries. Brussels: CIDESA, 1971 Nr. 1257, topic code 522)