World demographic estimates and projections, 1950-2025 : total population, school-age population, economically active population, agricultural and non-agricultural population, urban and rural population /. - Naciones Unidas Departamento de Asuntos Económicos y Sociales (New York : United Nations, 1988)
A la cabeza de la portada: Department of International Economic and Social Affairs--"ST/ESA/SER.R/79"
Keywords: TRANSICION DEMOGRAFICA; POBLACION -- ESTADISTICAS