http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
compilers/editors, Roy J. Irwin with assistance from Colorado State University ; student assistant contaminants specialists, Mark Van Mouwerik ... [and others].
Title from title screen (viewed Nov. 26, 2003).
At head of title: The National Park Service.
Mode of access: Internet from the NPS web site. Address as of 11/26/03: http://www1.nature.nps.gov/toxic/; current access available via PURL.