"The project and this particular document — I. Definition — II. Terminology — Appendices giving classification by subject, general headings within which one finds sub-division into sub-headings for questions necessitating more detailed and more specialised research. Deals with: Audio-Visual Communication Review, vol. 11, n° 1, Januari-February 1963, Supplement n° 6 (which is published as Monograph n° 1 of the Technological Development Project of the National Education Association of the United States)." (Jean-Marie Van Bol, Abdelfattah Fakhfakh: The use of mass media in the developing countries. Brussels: CIDESA, 1971 Nr. 437, topic code 50)