United States. Department of Commerce. "Widespread Gross State Product (GSP) Growth in 2004 Led by Services-Providing Industries : Accelerated Estimates of GSP by Industry for 2004, BEA 05-46,"
United States Department of Commerce News
(October 26, 2005).
https://fraser.stlouisfed.org/title/6148/item/597999, accessed on June 1, 2026.