000 00324nam a2200145Ia 4500
020 _a0000000000
082 _b3015
_a530
100 _a"NA"
245 0 _aPhysics
260 _bSay Publishing Pvt Limited
_aKarachi
_c2003
300 _a222
944 _cTR
999 _c631585
_d631585