000 00446nam a2200181Ia 4500
008 220902s9999 xx 000 0 und d
041 _a  ENGLISH
082 _a570.03.03
082 _bDUG
100 _aDUGGAL, K. N.
245 0 _aELEMENTS OF ENVIRONMENTAL ENGINEERING.
250 _b2013
260 _aNEW DELHI
260 _bS. CHAND AND COMPANY
300 _a451
650 _a  ENVIRONMENTAL ENGINEERING
942 _cTB
999 _c152302
_d152302