United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "August 1987," Business Conditions Digest (August 1987) : 1-1. https://fraser.stlouisfed.org/title/43/item/7492/toc/113527 , accessed on March 29, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "August 1987," Business Conditions Digest (August 1987) : 1-1. https://fraser.stlouisfed.org/title/43/item/7492/toc/113527 , accessed on March 29, 2024.