00330nam a2200121 a 450000500170000002000180001708200190003510000060005411000610006024500330012126000480015450000060020220251203111003.0  a9789211514322  a304.60728bWOR  d_  aDepartment of Economic and Social Affairs United Nations  aWorld population ageing 2007  aNew YorkbUnited Nations Publicationsc2007  a-