United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "March 1976," Business Conditions Digest (March 1976) : 1-1. https://fraser.stlouisfed.org/title/43/item/7355/toc/317470 , accessed on March 29, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "March 1976," Business Conditions Digest (March 1976) : 1-1. https://fraser.stlouisfed.org/title/43/item/7355/toc/317470 , accessed on March 29, 2024.