United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "November 1961," Business Conditions Digest (November 1961) : 1-1. https://fraser.stlouisfed.org/title/43/item/7173/toc/111646 , accessed on April 19, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "November 1961," Business Conditions Digest (November 1961) : 1-1. https://fraser.stlouisfed.org/title/43/item/7173/toc/111646 , accessed on April 19, 2024.