000 00414nam a2200169Ia 4500
008 230524s9999 xx 000 0 und d
020 _a8121915473
082 _a628
_bDUG
100 _aK.N.Duggal
245 0 _aElements of Environmental Engineering
250 _a1ST
260 _aNEW DELHI
_b"S,Chand"
_c2007
300 _aXVII;429
500 _aQuantity Number: 9
650 _aEnvironmental
942 _cBK
999 _c37608
_d37608