World demographic estimates and projections, 1950-2025 : total population, school-age population, economically active population, agricultural and non-agricultural population, urban and rural population : a report /
United Nations.Department of International Economic and Social Affairs.
International Labour Organisation.
Food and Agriculture Organization of the United Nations.
New York : United Nations,
1988.
At head of title: Department of International Economic and Social Affairs.
Population
Population forecasting