004620000a22001450004500003000900000005001700009245006700026562001700093264009500110490004800205300000900253041000800262650003100270650001500301PH-MaWHO20241108112143.0  aInternal migration and structural changes in the labour force.  aST/ESCAP/630  aBangkok : bUnited Nations Economic and Social Commission for Asia and the Pacific,c1988.  a(Asian population studies series ; no. 90).  a69p.  aeng  aEmigration and immigration  aEmployment