United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "September 1986," Business Conditions Digest (September 1986) : 1-1. https://fraser.stlouisfed.org/title/43/item/7481/toc/56090 , accessed on May 3, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "September 1986," Business Conditions Digest (September 1986) : 1-1. https://fraser.stlouisfed.org/title/43/item/7481/toc/56090 , accessed on May 3, 2024.