00369nam a2200121Ia 4500008004100000040001700041082002200058110001900080245008100099260003100180300001500211440002100226190329s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta304.8bU58R  aUnited Nations 0aReplacement migrationbis it a solution to declining and aging populations ?  aNew Yorkbthe Authorc2001  aviii,151p.  aST/ESA/SER.A/206