http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Floral and Nursery Plants Research Unit.
"U.S. National Arboretum Plant Introduction."
Title from title screen (viewed on Apr. 5, 2006).
Mode of access: Internet from USDA web site. Address as of 4/5/06: http://www.usna.usda.gov/Newintro/Arapaho%5FLR.pdf; current access available via PURL.