00461nam a2200169Ia 4500082002300000100001800023245005000041260002300091300001300114500000500127690000600132700000500138952010400143964001700247921001000264999001700274  a658.31243bH893.CB  aHughes, J. J.  aCost-benefit aspects of manpower retrainingb  aLondonbHMSOc1970  avi, 42p.  a  a   a  00104070aISIbISId1998-10-09l0o658.31243 H893.CBpDP4677r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a16799  c16799d16799