00600nam a2200133Ia 4500008004100000040001700041082002500058110007600083245016900159260003500328300001600363440002700379650006000406190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta305.2606bU58E  aUnited Nations. Department of International Economic and Social Affairs 0aEconomic and social implications of papulation agingbproceedings of the International symposium on population structure and Development Tokyo, 10-12 September 1987  aNew YorkbUnited Nationsc1988  aviii, 430p.  aPopulation studies; 85  aPopulation; Age distribution(Demography)-United Nations