Description
Item Description:Title from title screen (viewed Aug. 2, 2007).
"July 2007."
"EPA 841-B-07-002."
Electronic resource.
Physical Description:287 unnumbered pages : digital, PDF file.
Format:Mode of access: Internet from the EPA web site. Address as of 7/24/09: http://www.epa.gov/owow/nps/hydromod/pdf/Hydromod%5Fall%5Fweb.pdf ; current access available via PURL.
Bibliography:Includes bibliographical references.