Title from title screen (viewed on July 7, 2003). "September 1991." "EPA/540/2-91/020A."
Includes bibliographical references.
System requirements: Adobe Acrobat Reader. Mode of access: Internet from the EPA Technology Innovation Office web site. Address as of 7/7/2003: http://www.epa.gov/swertio1/download/remed/5402-91020a-s.pdf; current access available via PURL.