United States. Bureau of the Census. "June 1978," Business Conditions Digest (June 1978). https://fraser.stlouisfed.org/title/43/item/7382, accessed on March 28, 2024.
United States. Bureau of the Census. "June 1978," Business Conditions Digest (June 1978). https://fraser.stlouisfed.org/title/43/item/7382, accessed on March 28, 2024.