United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "October 1987," Business Conditions Digest (October 1987) : 2-2. https://fraser.stlouisfed.org/title/43/item/7494/toc/49650 , accessed on April 25, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "October 1987," Business Conditions Digest (October 1987) : 2-2. https://fraser.stlouisfed.org/title/43/item/7494/toc/49650 , accessed on April 25, 2024.