000 00256nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aKulshreshtha, Pradeep
245 0 _aVigyan Shikshan
260 _aAgra
_bAggarwal
_c2013
300 _a276p.
942 _cBK
999 _c15575
_d15575