United States. Bureau of Labor Statistics. "July 1971," The Employment Situation (August 6, 1971). https://fraser.stlouisfed.org/title/144/item/496974, accessed on April 18, 2024.
United States. Bureau of Labor Statistics. "July 1971," The Employment Situation (August 6, 1971). https://fraser.stlouisfed.org/title/144/item/496974, accessed on April 18, 2024.