United States. Bureau of the Census. "Table of Contents," in United States. Bureau of the Census. "April 1963," Business Conditions Digest (April 1963) : 5-6. https://fraser.stlouisfed.org/title/43/item/7190/toc/260128 , accessed on April 26, 2024.
United States. Bureau of the Census. "Table of Contents," in United States. Bureau of the Census. "April 1963," Business Conditions Digest (April 1963) : 5-6. https://fraser.stlouisfed.org/title/43/item/7190/toc/260128 , accessed on April 26, 2024.