000 00252nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aNegi, J.S.
245 0 _aBhotik Vigyan Shikshan
260 _aAgra
_bAggarwal
_c2012
300 _a408p.
942 _cBK
999 _c15540
_d15540