http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Res. rep. - North Cent. Weed Sci. Soc. (U.S.)
Research report (North Central Weed Science Society)
North Central Weed Science Society (U.S.)
Research report (North Central Weed Science Society (U.S.) : CD-ROM)