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|Material Type:||Document, Government publication, National government publication, Internet resource|
|Document Type:||Internet Resource, Computer File|
|All Authors / Contributors:||United States. Environmental Protection Agency. Office of Water.|
|Notes:||Title from title screen (viewed Aug. 4, 2004).
|Details:||Mode of access: Internet from the EPA web site. Address as of 8/4/2004: http://www.epa.gov/ostwater/methods/1664guide.pdf; current access available via PURL.|