000			00535nam a22001937a 4500
008			230221b |||||||| |||| 00| 0 eng d
040			_aNational Science Library _cNational Science Library
080			_a628.1 _bL7
100			_aClark, John W
245			_aWater supply and pollution control
250			_a3rd ed.
260			_aNew York: _bIEP-A Dun Donnelley Publishers, _c1977
300			_a857p.
650			_aScience
653			_aSewage
653			_aBiological treatment
700			_aHammer, Mark J
942			_2udc _cBK
999			_c47122 _d47122