United States. Bureau of the Census. "Leading Indicators," in United States. Bureau of the Census. "June 1973," Business Conditions Digest (June 1973) : 69-69. https://fraser.stlouisfed.org/title/43/item/7322/toc/166889 , accessed on May 10, 2024.
United States. Bureau of the Census. "Leading Indicators," in United States. Bureau of the Census. "June 1973," Business Conditions Digest (June 1973) : 69-69. https://fraser.stlouisfed.org/title/43/item/7322/toc/166889 , accessed on May 10, 2024.