000 00299 am a2200121 a 4500
100 1 _a
_d
245 1 _aLabor productivity
_bUn tour d'horizon
260 _aWashington
_c1981
300 _a1-70 p.
942 _2udc
_cB
440 _aWashington World Bank Staff Working Paper No. 497
901 _aS34671
999 _c114492
_d114492