66th Annual Congress of the South African Association for the Advancement of Science, Lourenço Marques, 2-5 July 1968. Southern Africa Regional Symposium on Scientific and Technical Information, Lourenço Marques, 2-5 July 1968 =66º Congresso Anual da South African Association for the Advancement of Science, Lourenço Marques, 2-5 Julho 1968 == Simpósio Regional da África Austral sobre Informação Científica e Técnica, Lourenço Marques, 2-5 Julho 1968