Proceedings of Conference on the implementation problems of economic development plans and Government decisions in the countries of Black Africa (3-7 March, 1969). Volume I
Proceedings of Conference on the implementation problems of economic development plans and Government decisions in the countries of Black Africa (3-7 March, 1969). Volume 2
Proceedings of Conference on the implementation problems of economic development plans and Government decisions in the countries of Black Africa (3-7 March, 1969). Volume 3
«A 'Possessão' espírita entre os Quiocos da Lunda». Separata do Boletim do Instituto de Investigação Científica de Angola: Vol. 8, nº 1, p, 1-22, 1971.