United States. Bureau of the Census. "Table of Contents," in United States. Bureau of the Census. "May 1989," Business Conditions Digest (May 1989) : 3-4. https://fraser.stlouisfed.org/title/43/item/7513/toc/331678 , accessed on April 26, 2024.
United States. Bureau of the Census. "Table of Contents," in United States. Bureau of the Census. "May 1989," Business Conditions Digest (May 1989) : 3-4. https://fraser.stlouisfed.org/title/43/item/7513/toc/331678 , accessed on April 26, 2024.