000 00300nam a2200133Ia 4500
999 _c17022
_d17022
020 _a8120402154
100 _aNarayana Rao M
245 _aWaste Water Treatment
250 _a2
260 _c1987
_bOXFORD & IBH PUBLISHING CO
_aNew Delhi
300 _aix+345
700 _aAmal K Datta
942 _cBK