[Washington, DC] : National Center for Environmental Assessment-Washington Office, Office of Research and Development, U.S. Environmental Protection Agency, [1997]
OCLC
ocm53073109
Title from title screen (viewed on Sept. 23, 2003).
"May 1997."
"EPA/600/R-97/090."
Includes bibliographical references.
System requirements: Adobe Acrobat Reader required.
Mode of access: Internet from the EPA Office of Research and Development web site. Address as of 9/23/2003: http://www.epa.gov/nceawww1/pdfs/lympho.pdf; current access available via PURL.