United States. Bureau of Economic Analysis. "U.S. International Trade in Goods and Services: April 2006 : Highlights: Trade Gap Widens in April 2006, CB 06-86, BEA 06-25, FT-900 (06-04)," Bureau of Economic Analysis (BEA) News Releases (June 9, 2006). https://fraser.stlouisfed.org/title/6148/item/598036/content/pdf/bea_newsreleases_20060609_a25_hi, accessed on March 20, 2025.