Search Results for the EPA National Library Catalog

Items Found: 4

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Your Search: (AUTHOR=Porter AND Stephen AND D.)


Select Item Title Year Published
Biological and chemical indicators of eutrophication in Yellowstone River and major tributaries during August 2000. 2002
Influence of natural factors on the quality of midwestern streams and rivers 2001
Methods for collecting algal samples as part of the National Water-Quality Assessment Program / 1993
Water quality in the eastern Iowa basins, Iowa and Minnesota, 1996-98 / 2000

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