00457nam a2200169Ia 4500082002400000100002300024245004100047260002500088300001200113500000500125690000600130700000500136952010500141964001700246921000900263999001500272  a338.01(73)bF126.BF  aFabricant, Solomon  aBasic facts on productivity changeb  aNew YorkbNBERc1959  ax, 49p.  a  a   a  00104070aISIbISId1998-09-09l0o338.01(73) F126.BFpDP2172r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a9790  c9790d9790