United States. Bureau of Economic Analysis. "August 1940," Survey of Current Business (August 1940). https://fraser.stlouisfed.org/title/46/item/9372, accessed on May 8, 2024.
United States. Bureau of Economic Analysis. "August 1940," Survey of Current Business (August 1940). https://fraser.stlouisfed.org/title/46/item/9372, accessed on May 8, 2024.