United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "December 1988," Business Conditions Digest (December 1988) : 1-1. https://fraser.stlouisfed.org/title/43/item/7508/toc/405777 , accessed on May 16, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "December 1988," Business Conditions Digest (December 1988) : 1-1. https://fraser.stlouisfed.org/title/43/item/7508/toc/405777 , accessed on May 16, 2024.