United States. Bureau of the Census. "October 1977," Business Conditions Digest (October 1977). https://fraser.stlouisfed.org/title/43/item/7374, accessed on April 23, 2024.
United States. Bureau of the Census. "October 1977," Business Conditions Digest (October 1977). https://fraser.stlouisfed.org/title/43/item/7374, accessed on April 23, 2024.