"Child learns incidentally — Nature of learning from television, on what does it depend? — What learning should we expect? — Television in school, educational television at home — The authors conclude that television is of most help as a source of knowledge for young children." (Jean-Marie Van Bol, Abdelfattah Fakhfakh: The use of mass media in the developing countries. Brussels: CIDESA, 1971 Nr. 2086, topic code 410.320, 410.330, 04)