United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "January 1966," Business Conditions Digest (January 1966) : 1-1. https://fraser.stlouisfed.org/title/43/item/7223/toc/254505 , accessed on May 11, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "January 1966," Business Conditions Digest (January 1966) : 1-1. https://fraser.stlouisfed.org/title/43/item/7223/toc/254505 , accessed on May 11, 2024.