000 00267nam a2200133Ia 4500
100 _aKhanna/ O.R.
942 _cBK
654 _awork
245 _aWork Study
260 _bDhanpat Rai & Sons
_aDelhi
_c1979
082 _a658.54
300 _a196
546 _aENGLISH
999 _c20408
_d20408