United States. Bureau of the Census. "Table of Contents," in United States. Bureau of the Census. "July 1978," Business Conditions Digest (July 1978) : 3-4. https://fraser.stlouisfed.org/title/43/item/7383/toc/333746 , accessed on May 14, 2024.
United States. Bureau of the Census. "Table of Contents," in United States. Bureau of the Census. "July 1978," Business Conditions Digest (July 1978) : 3-4. https://fraser.stlouisfed.org/title/43/item/7383/toc/333746 , accessed on May 14, 2024.