Publisher:
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[Washington, D.C.] : United States Environmental Protection Agency, Office of Water, [2003] |
Phys. Desc.:
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1 electronic text : HTML file.
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Digital Content
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Click for online content. |
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Publisher:
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[Washington, D.C.] : United States Environmental Protection Agency, Office of Water, [2002] |
Phys. Desc.:
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2 p. : digital, PDF file.
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Digital Content
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Click for online content. |
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Publisher:
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Morgantown, WV : National Environmental Services Center |
Phys. Desc.:
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1 online resource
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Digital Content
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Click for online content. |
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Publisher:
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Washington : U.S. G.P.O., 2009. |
Phys. Desc.:
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1 online resource (xiii, 111 pages) : illustrations.
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Digital Content
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Click for online content. |
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Publisher:
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Washington, DC : U.S. Environmental Protection Agency, Office of Water, 2004. |
Phys. Desc.:
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1 online resource ([2] pages) : color illustrations.
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Digital Content
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Click for online content. |
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