McGuire, Virginia L ; Geological Survey (U.S.) Also available via Internet from the USGS web site. Address as of 6/15/04: http://pubs.usgs.gov/fs/2004/3026/pdf/fs04-3026.pdf; current access available via PURL..
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2004
McGuire, Virginia L ; Geological Survey (U.S.) Also available via Internet at the USGS web site. Address as of 10/13/04: http://water.usgs.gov/pubs/circ/2003/circ1243/pdf/C1243.pdf; current access available via PURL..
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2003
McGuire, Virginia L ; Geological Survey (U.S.) Also available via Internet from the USGS web site. Address as of 11/26/03: http://water.usgs.gov/pubs/fs/FS078-03/pdf/FS078-03.pdf; current access available via PURL..
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2003