000 00338nam a2200133Ia 4500
008 220201s2016 xx 000 0 eng d
082 _bNEL
100 _aNelson , D L
245 0 _aTextbook of Environment engineering
250 _a1st ed
260 _aNew Delhi
_bCBS publication & Distribution
_c2016
300 _a463p.
942 _2ddc
999 _c38089
_d38089