000 00246nam a22001097a 4500
003 OSt
100 _aRajput, J S
245 _aParyavaran Vigyan ka Shikshan Shastra
260 _aAgra
_bAgarwal Publication
_c2013
300 _a207p.
942 _2ddc
_cBK
999 _c4165
_d4165