000 00295nam a2200133Ia 4500
020 _a978-8121915472
082 _a628.5
100 _aDuggal K N
_9160
245 0 _aElements of Environmental Engineering
250 _a1
260 _bS.Chand
_c2009
_aNew Delhi
650 _aCE
_965
942 _cBK
999 _c14463
_d14463