United States. Bureau of Economic Analysis. "Gross National Product (GNP), Gross Domestic Product (GDP) : Preliminary Second Quarter 1975, BEA 75-50,"
Bureau of Economic Analysis (BEA) News Releases
(July 17, 1975).
https://fraser.stlouisfed.org/title/6148/item/595471, accessed on March 22, 2025.
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