United States. Bureau of Labor Statistics. "March 1972," The Employment Situation (April 7, 1972). https://fraser.stlouisfed.org/title/144/item/496982, accessed on May 4, 2024.
United States. Bureau of Labor Statistics. "March 1972," The Employment Situation (April 7, 1972). https://fraser.stlouisfed.org/title/144/item/496982, accessed on May 4, 2024.