United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "April 1965," Business Conditions Digest (April 1965) : 2-2. https://fraser.stlouisfed.org/title/43/item/7214/toc/135641 , accessed on April 18, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "April 1965," Business Conditions Digest (April 1965) : 2-2. https://fraser.stlouisfed.org/title/43/item/7214/toc/135641 , accessed on April 18, 2024.