United States. Department of Commerce. "U.S. International Trade in Goods and Services : Annual Revision for 2005, CB 06-87, BEA 06-26, FT-900 (06-04)," United States Department of Commerce News (June 9, 2006). https://fraser.stlouisfed.org/title/6148/item/598037, accessed on June 4, 2026.