"International statistics covering the following fields: Population — Educational establishments — Public expenditure on education — Libraries and museums — Production of books — Newspapers and other periodicals — Consumption of paper — Cinema — Radio — Television." (Jean-Marie Van Bol, Abdelfattah Fakhfakh: The use of mass media in the developing countries. Brussels: CIDESA, 1971 Nr. 196, topic code 10, 20, 30, 40)