000 00251nam a2200097Ia 4500
008 190719s9999 xx 000 0 und d
100 _aMukesh Trehan&Ranju Trehan
245 0 _aVyavesayik Vatavern 2nd sem
260 _aN.D
_bV.K,India
_c2009
942 _cBK
999 _c13486
_d13486