United States. Bureau of the Census. "Appendixes," in United States. Bureau of the Census. "October 1975," Business Conditions Digest (October 1975) : 115-126. https://fraser.stlouisfed.org/title/43/item/7350/toc/240209 , accessed on April 25, 2024.
United States. Bureau of the Census. "Appendixes," in United States. Bureau of the Census. "October 1975," Business Conditions Digest (October 1975) : 115-126. https://fraser.stlouisfed.org/title/43/item/7350/toc/240209 , accessed on April 25, 2024.