United States. Bureau of Economic Analysis. "August 1927," Survey of Current Business (August 1927). https://fraser.stlouisfed.org/title/46/item/9216, accessed on December 6, 2023.
United States. Bureau of Economic Analysis. "August 1927," Survey of Current Business (August 1927). https://fraser.stlouisfed.org/title/46/item/9216, accessed on December 6, 2023.