United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "December 1964," Business Conditions Digest (December 1964) : 1-1. https://fraser.stlouisfed.org/title/43/item/7210/toc/375295 , accessed on April 18, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "December 1964," Business Conditions Digest (December 1964) : 1-1. https://fraser.stlouisfed.org/title/43/item/7210/toc/375295 , accessed on April 18, 2024.