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1by Symposium on Social Science Cooperation in Africa South of the Sahara, Dar-es-Salaam, 1973, Round Table on Regional Social Science Activities in Africa South of the Sahara, Lomé, 1972, Dikoumé, Cosmeprogramme and meeting document bibliotecaUNESCO
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2by Symposium on Social Science Cooperation in Africa South of the Sahara, Dar-es-Salaam, 1973, Round Table on Regional Social Science Activities in Africa South of the Sahara, Lomé, 1972, Dikoumé, Cosmeprogramme and meeting document bibliotecaUNESCO