United States. Bureau of the Census. "November 1987," Business Conditions Digest (November 1987). https://fraser.stlouisfed.org/title/43/item/7495, accessed on April 23, 2024.
United States. Bureau of the Census. "November 1987," Business Conditions Digest (November 1987). https://fraser.stlouisfed.org/title/43/item/7495, accessed on April 23, 2024.