Description
Published:Update #1 (Feb. 1997).
Item Description:Title from caption (viewed on Oct. 24, 2002).
Title from Web page (viewed on Oct. 24, 2002).
Electronic resource.
Publication Frequency:Semiannual
Format:Mode of access: via Internet from the EPA Web site. Address as of 7/22/03: http://www.epa.gov/opptintr/epp/pubs/update1.txt; current access is available via PURL.