United States. Bureau of Economic Analysis. "November 1927," Survey of Current Business (November 1927). https://fraser.stlouisfed.org/title/46/item/9219, accessed on December 6, 2023.
United States. Bureau of Economic Analysis. "November 1927," Survey of Current Business (November 1927). https://fraser.stlouisfed.org/title/46/item/9219, accessed on December 6, 2023.