United States. Bureau of the Census. "September 1988," Business Conditions Digest (September 1988). https://fraser.stlouisfed.org/title/43/item/7505, accessed on April 26, 2024.
United States. Bureau of the Census. "September 1988," Business Conditions Digest (September 1988). https://fraser.stlouisfed.org/title/43/item/7505, accessed on April 26, 2024.