United States. Bureau of the Census. "Contents," in United States. Bureau of the Census. "October 1966," Business Conditions Digest (October 1966) : 3-4. https://fraser.stlouisfed.org/title/43/item/7232/toc/319988 , accessed on April 17, 2024.
United States. Bureau of the Census. "Contents," in United States. Bureau of the Census. "October 1966," Business Conditions Digest (October 1966) : 3-4. https://fraser.stlouisfed.org/title/43/item/7232/toc/319988 , accessed on April 17, 2024.