000 00261nam a2200109Ia 4500
008 220321s9999 xx 000 0 und d
100 _aV K Maheshwari
245 0 _aPedagogy of Physical Sciences
260 _aMeerut, D.S.A
_c2017
300 _a277
942 _cRF
999 _c10077
_d10077