United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "April 1988," Business Conditions Digest (April 1988) : 2-2. https://fraser.stlouisfed.org/title/43/item/7500/toc/188254 , accessed on April 19, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "April 1988," Business Conditions Digest (April 1988) : 2-2. https://fraser.stlouisfed.org/title/43/item/7500/toc/188254 , accessed on April 19, 2024.