United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "September 1988," Business Conditions Digest (September 1988) : 2-2. https://fraser.stlouisfed.org/title/43/item/7505/toc/370765 , accessed on April 20, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "September 1988," Business Conditions Digest (September 1988) : 2-2. https://fraser.stlouisfed.org/title/43/item/7505/toc/370765 , accessed on April 20, 2024.