United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "December 1978," Business Conditions Digest (December 1978) : 2-2. https://fraser.stlouisfed.org/title/43/item/7388/toc/201776 , accessed on May 4, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "December 1978," Business Conditions Digest (December 1978) : 2-2. https://fraser.stlouisfed.org/title/43/item/7388/toc/201776 , accessed on May 4, 2024.