United States. Bureau of Labor Statistics. "January 1971," The Employment Situation (February 5, 1971). https://fraser.stlouisfed.org/title/144/item/496968, accessed on April 24, 2024.
United States. Bureau of Labor Statistics. "January 1971," The Employment Situation (February 5, 1971). https://fraser.stlouisfed.org/title/144/item/496968, accessed on April 24, 2024.