Research Triangle Park, NC : National Toxicology Program, U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health, [2000]
Includes bibliographical references (pages 69-79).
Mode of access: Internet from the NTP web site. Address as of 12/21/06: http://ntp.niehs.nih.gov/ntp/htdocs/LT%5Frpts/tr487.pdf; current access is available via PURL.