United States. Bureau of Economic Analysis. "U.S. International Trade in Goods and Services, January 2010, BEA 10-07, CB 10-33, FT-900 (10-01)," Bureau of Economic Analysis (BEA) News Releases (March 11, 2010). https://fraser.stlouisfed.org/title/6148/item/601139, accessed on March 22, 2025.