Description
Item Description:Title from title screen (viewed Sept. 2, 2008).
Electronic resource.
Physical Description:xviii, 195 pages : digital, PDF file.
Format:Mode of access: Internet at the EPA web site. Address as of 9/2/08: http://www.epa.gov/ada//download/reports/600R06155/600R06155-01.pdf ; current access available via PURL.