000 00312nam a2200133Ia 4500
100 _aInternational Labour Organisation
942 _cBK
654 _aWork study
245 _aIntroduction to work study
260 _bI.L.O. Publication
_aGENEVA
_c1977
082 _a658.542
300 _a436
546 _aENGLISH
999 _c30507
_d30507