London: Overseas Visual Aids Center (1963), 32 pp.
"Report of an enquiry carried out from June 1961 of the beginning of 1962 in Nairobi, under the auspices of the Kenyan Ministry of Public Health — Survey of the factors which affect the difficulty of understanding graphs in order to increase the number of symbols used." (Jean-Marie Van Bol, Abdelf
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attah Fakhfakh: The use of mass media in the developing countries. Brussels: CIDESA, 1971 Nr. 1042, topic code 59)
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"Report on experiments carried out in Tanganyika by means of posters, film transparencies and films — Results and suggestions." (Jean-Marie Van Bol, Abdelfattah Fakhfakh: The use of mass media in the developing countries. Brussels: CIDESA, 1971 Nr. 2194, topic code 310.1)