"Nigerian experiment concerning the use of audio-visual aids in teaching local government officials at the Institute of Administration — Receptivity to visual aids, difficulty in understanding theories and principles — Choice of audio-visual aids — Popularity of the radio in the country — These are the questions dealth with by the author, but he concludes by afferming that the audio-visual aid used should not be complex, whatever may be." (Jean-Marie Van Bol, Abdelfattah Fakhfakh: The use of mass media in the developing countries. Brussels: CIDESA, 1971 Nr. 378, topic code 521.1)