000 nam a22 7a 4500
999 _c235035
_d235035
003 Nust
005 20170405121300.0
008 170405b xxu||||| |||| 00| 0 eng d
040 _cDLC
082 _a628.1 KUM
100 _4Kumar, Arvind
245 _aA Textbook of Environmental Science
260 _c2009
942 _2ddc
_cBK