United States. Bureau of Labor Statistics. "January 1972," The Employment Situation (February 4, 1972). https://fraser.stlouisfed.org/title/144/item/496980, accessed on April 19, 2024.
United States. Bureau of Labor Statistics. "January 1972," The Employment Situation (February 4, 1972). https://fraser.stlouisfed.org/title/144/item/496980, accessed on April 19, 2024.