000 00283nam a2200133Ia 4500
100 _aDalela, S.
365 _b12.5
942 _cBK
654 _a
245 _aElements of work study
260 _aDelhi
_bStandard Publishers
_c1971
082 _a658.54
300 _c22cm
_aviii,298
999 _c422056
_d422056
041 _aeng