Water quality standards for the 21st century : proceedings of a national conference, December 10-12, 1990 Arlington, Virginia, by Gretchen H. Flock et al.

Title:	Water quality standards for the 21st century : proceedings of a national conference, December 10-12, 1990 Arlington, Virginia
Author:	Flock, Gretchen H.
Author:	United States. Environmental Protection Agency. Office of Water
Note:	U. S. Environmental Protection Agency, Office of Water, 1989

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Subject:	Water quality management
Subject:	Water -- Standards
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