United States. Bureau of Economic Analysis. "Preliminary Second Quarter 1972 GNP and Annual Revision of National Accounts, BEA 72-46,"
Bureau of Economic Analysis (BEA) News Releases
(July 21, 1972).
https://fraser.stlouisfed.org/title/6148/item/595343, accessed on May 12, 2025.
@FedFRASER