United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "September 1963," Business Conditions Digest (September 1963) : 1-1. https://fraser.stlouisfed.org/title/43/item/7195/toc/250583 , accessed on April 26, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "September 1963," Business Conditions Digest (September 1963) : 1-1. https://fraser.stlouisfed.org/title/43/item/7195/toc/250583 , accessed on April 26, 2024.