United States. Bureau of the Census. "Production and Income," in United States. Bureau of the Census. "May 1978," Business Conditions Digest (May 1978) : 68-69. https://fraser.stlouisfed.org/title/43/item/7381/toc/226202 , accessed on May 4, 2024.
United States. Bureau of the Census. "Production and Income," in United States. Bureau of the Census. "May 1978," Business Conditions Digest (May 1978) : 68-69. https://fraser.stlouisfed.org/title/43/item/7381/toc/226202 , accessed on May 4, 2024.