United States. Bureau of Economic Analysis. "September 1938," Survey of Current Business (September 1938). https://fraser.stlouisfed.org/title/46/item/9349, accessed on April 14, 2024.
United States. Bureau of Economic Analysis. "September 1938," Survey of Current Business (September 1938). https://fraser.stlouisfed.org/title/46/item/9349, accessed on April 14, 2024.