United States. Bureau of Labor Statistics. "March 1970," The Employment Situation (April 10, 1970). https://fraser.stlouisfed.org/title/144/item/496958, accessed on May 7, 2024.
United States. Bureau of Labor Statistics. "March 1970," The Employment Situation (April 10, 1970). https://fraser.stlouisfed.org/title/144/item/496958, accessed on May 7, 2024.