http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
protecting American agriculture from foreign pests and diseases
Animal and Plant Health Inspection Service.
1 online resource (15 pages) : color illustrations
Title from PDF title screen (viewed on June 1, 2011).
Plant Protection and Quarantine Programs.
Program aid (United States. Department of Agriculture) ; no. 1942