000 00250nam a22001097a 4500
003 OSt
100 _aVarshney, Sadhna
245 _aBhautik Vigyan Shikshan Path Yojnayen
260 _aAgra
_bAgarwal Publication
_c2015
300 _a132p.
942 _2ddc
_cBK
999 _c4271
_d4271