United States. Bureau of the Census. "Table of Contents," in United States. Bureau of the Census. "July 1989," Business Conditions Digest (July 1989) : 3-4. https://fraser.stlouisfed.org/title/43/item/7515/toc/331911 , accessed on April 26, 2024.
United States. Bureau of the Census. "Table of Contents," in United States. Bureau of the Census. "July 1989," Business Conditions Digest (July 1989) : 3-4. https://fraser.stlouisfed.org/title/43/item/7515/toc/331911 , accessed on April 26, 2024.