000 00292nam a2200121Ia 4500
008 180721s9999 xx 000 0 und d
100 _a"Duggal, K.N.,"
245 0 _aElements of Environmental Engineering
260 _bS.Chand & Company
260 _c1998
365 _b80.00
942 _cBK
999 _c140338
_d140338