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5Charles E. Hanrahan. "Agricultural Export and Food Aid Programs." CRS Issue Brief, Order Code IB98006. March 9, 2006. p.1.
6USDA' s Foreign Agricultural Service. "Fact Sheet" , February, 2006.<http://www.fas.usda.gov/ustrade/>.
7U.S. Census Bureau. "U.S. INTERNATIONAL TRADE IN GOODS AND SERVICES, " April 2006<www.bea.gov/bea/di/ home/trade.htm>.