United States. Congress. Joint Economic Committee, 1956- and Eighty-Sixth Congress, 1959-1961. "Part 2 -- Historical and Comparative Rates of Production, Productivity, and Prices, April 7, 8, 9, and 10, 1959" in Employment, Growth, and Price Levels : Hearings Before the Joint Economic Committee, Congress of the United States, Eighty-Sixth Congress, First Session, Pursuant to S. Con. Res. 13 (1959) (April 7, 8, 9, and 10, 1959). https://fraser.stlouisfed.org/title/1242/item/3623, accessed on January 15, 2025.