United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "December 1976," Business Conditions Digest (December 1976) : 1-1. https://fraser.stlouisfed.org/title/43/item/7364/toc/331515 , accessed on April 24, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "December 1976," Business Conditions Digest (December 1976) : 1-1. https://fraser.stlouisfed.org/title/43/item/7364/toc/331515 , accessed on April 24, 2024.