004080000a22001570004500003000900000005001700009110003600026245005800062020001800120264003100138300000900169041000800178650001500186650002800201700002100229PH-MaWHO20241108112355.0  aUnited Nations Population Fund.  aPopulation in the 21st century : UNFPA and Agenda 21.  a0-89714-433-3  aNew York : bUNFPA,c1997.  a16p.  aeng  aPopulation  aSustainable development  aAgenda 21 (1992)