United States. Bureau of Economic Analysis. "First Quarter 1978 : GNP and Gross Domestic Product (Revised), Corporate Profits and National Income (Revised), BEA 78-45,"
Bureau of Economic Analysis (BEA) News Releases
(June 20, 1978).
https://fraser.stlouisfed.org/title/6148/item/595760, accessed on March 22, 2025.
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