United States. Bureau of Economic Analysis. "September 1937," Survey of Current Business (September 1937). https://fraser.stlouisfed.org/title/46/item/9337, accessed on April 18, 2024.
United States. Bureau of Economic Analysis. "September 1937," Survey of Current Business (September 1937). https://fraser.stlouisfed.org/title/46/item/9337, accessed on April 18, 2024.