United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "January 1988," Business Conditions Digest (January 1988) : 1-1. https://fraser.stlouisfed.org/title/43/item/7497/toc/379225 , accessed on March 28, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "January 1988," Business Conditions Digest (January 1988) : 1-1. https://fraser.stlouisfed.org/title/43/item/7497/toc/379225 , accessed on March 28, 2024.