United States. Bureau of Economic Analysis. "The Business Situation, OBE 67-56," Bureau of Economic Analysis (BEA) News Releases (October 20, 1967). https://fraser.stlouisfed.org/title/6148/item/594685, accessed on July 17, 2024.
United States. Bureau of Economic Analysis. "The Business Situation, OBE 67-56," Bureau of Economic Analysis (BEA) News Releases (October 20, 1967). https://fraser.stlouisfed.org/title/6148/item/594685, accessed on July 17, 2024.