1. United Nations Population Division: World Population Prospects: Estimates and Projections as Assessed in 1982, to be issued as a United National publication;
2. data reproduced in the Review and Appraisal of the World Population Plan of Action
3. Population: The Mexico Conference and the Future;Salas,1984
4. 1984 Estimates and projections; of McNamara R. S.;The World Bank,1984
5. World Assembly on Aging;United Nations,1982