Description
Item Description:Title from PDF title screen (viewed June 3, 2009).
"May 2007"
"EPA 130-R-07-004."
Electronic resource.
Physical Description:iv, 64 pages : digital, PDF file.
Format:Mode of access: Internet from the EPA web site. Address as of 6/3/09: http://epa.gov/etop/pubs/130r07004.pdf ; current access available via PURL.
Bibliography:Includes bibliographical references.