00459nam a2200133Ia 4500082002100000245004000021260003500061300001600096650002400112650002800136650003400164650005100198700007600249  a304.6091724 STA; 0aStable population age distributions  aNew YorkbUnited Nationsc1990  axiii, 420p.  aDemographic surveys  aStable population model  aAge distribution (Demography)  aDeveloping countries - Population - Statistics  aUnited Nations. Department of International Economic and Social Affairs