Universidad Pedagógica Nacional Unidad Ajusco Catálogo de la Biblioteca "Gregorio Torres Quintero"
by UNESCO | Symposium on Africa and the Second World War, 1980 : BenghaSymposium on Africa and the Second World War, 1980 : Benglazi, Libyan Arab Jamahiriya.
by UNESCO.
by UNESCO | Reunión de Expertos de la Descolonización de Africa: AfricaAustral y el Cuerno de Africa, 1978 : Varsovia.
by UNESCO | Symposium on Historical and Socio-Cultural Relations between Black Africa and the Arab World, 1979 : Paris.
by Ngcongco, L.D., coaut.
by Meeting of Experts on the Methodology of Contemporary African History, 1979 : Ouagadougou, Upper Volta.
by Symposium on the Peopling of Ancient Egypt and the Deciphering of the Meroitic Script, 1974 : Cairo | UNESCO.