000 00317nam a2200121Ia 4500
008 211209s1979 xx 000 0 und d
041 _aeng
082 _a628.16 N79 MET/EDD
100 _aMETCALF
245 _aWASTE WATER ENGINEERING TREATMENT DISPOSAL
260 _aNEW DELHI
_bTATA MCGRAW-HILL
_c1979
300 _a933
999 _c19961
_d19961