United States. Bureau of the Census. "August 1966," Business Conditions Digest (August 1966). https://fraser.stlouisfed.org/title/43/item/7230, accessed on April 23, 2024.
United States. Bureau of the Census. "August 1966," Business Conditions Digest (August 1966). https://fraser.stlouisfed.org/title/43/item/7230, accessed on April 23, 2024.