United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "November 1981," Business Conditions Digest (November 1981) : 1-1. https://fraser.stlouisfed.org/title/43/item/7423/toc/59867 , accessed on May 4, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "November 1981," Business Conditions Digest (November 1981) : 1-1. https://fraser.stlouisfed.org/title/43/item/7423/toc/59867 , accessed on May 4, 2024.