United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "April 1976," Business Conditions Digest (April 1976) : 1-1. https://fraser.stlouisfed.org/title/43/item/7356/toc/360139 , accessed on April 25, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "April 1976," Business Conditions Digest (April 1976) : 1-1. https://fraser.stlouisfed.org/title/43/item/7356/toc/360139 , accessed on April 25, 2024.