http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Foreign agricultural trade of the United States
Vols. for 1954-59 issued by the Foreign Agricultural Service; 1960 by the Economic Research Service, Dept. of Agriculture.
Foreign agricultural trade. United States foreign trade in agricultural products. Value by countries, calendar year
Foreign agricultural trade of the United States. Annual supplement, trade by countries. Calendar year