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Water quality update, vol. 6 no. 4, July 1997
(Oklahoma State University, 1997-07)
Water quality update, vol. 6 no. 3, June 1997
(Oklahoma State University, 1997-06)
Water quality update, vol. 6 no. 2, April 1997
(Oklahoma State University, 1997-04)
Water quality update, vol. 6 no. 7, October 1997
(Oklahoma State University, 1997-10)
Water quality update, vol. 6 no. 1, 15 January 1997
(Oklahoma State University, 1997-01-15)
Water quality update, vol. 6 no. 6, September 1997
(Oklahoma State University, 1997-09)
Water quality update, vol. 6 no. 5, August 1997
(Oklahoma State University, 1997-08)