United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "February 1978," Business Conditions Digest (February 1978) : 1-1. https://fraser.stlouisfed.org/title/43/item/7377/toc/118651 , accessed on April 27, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "February 1978," Business Conditions Digest (February 1978) : 1-1. https://fraser.stlouisfed.org/title/43/item/7377/toc/118651 , accessed on April 27, 2024.