United States. Bureau of the Census. "Table of Contents," in United States. Bureau of the Census. "March 1976," Business Conditions Digest (March 1976) : 3-4. https://fraser.stlouisfed.org/title/43/item/7355/toc/317472 , accessed on March 29, 2024.
United States. Bureau of the Census. "Table of Contents," in United States. Bureau of the Census. "March 1976," Business Conditions Digest (March 1976) : 3-4. https://fraser.stlouisfed.org/title/43/item/7355/toc/317472 , accessed on March 29, 2024.