000 00244nam a2200109Ia 4500
008 160921s9999 xx 000 0 und d
100 _aMAHESHWARI,B.K.
245 _aVIGYAN SHIKSHAN
260 _bR.LAL PUB.
_c2008
300 _a424
942 _cBK
999 _c31884
_d31884