000 00299nam a22001217a 4500
003 OSt
100 _aSharma, Khemraj
245 _aParyavaran Addhyan Shikshan : Bhautik Avam Jaivik Paryavaran
250 _a2nd ed.
260 _aAgra
_bAgarwal Publication
_c2014
300 _a464p.
942 _2ddc
_cBK
999 _c4666
_d4666