United States. Bureau of the Census. "August 1977," Business Conditions Digest (August 1977). https://fraser.stlouisfed.org/title/43/item/7372, accessed on April 18, 2024.
United States. Bureau of the Census. "August 1977," Business Conditions Digest (August 1977). https://fraser.stlouisfed.org/title/43/item/7372, accessed on April 18, 2024.