United States. Bureau of Labor Statistics. "March 1966," The Employment Situation (April 5, 1966). https://fraser.stlouisfed.org/title/144/item/496910, accessed on September 24, 2023.
Public Domain
United States. Bureau of Labor Statistics. "March 1966," The Employment Situation (April 5, 1966). https://fraser.stlouisfed.org/title/144/item/496910, accessed on September 24, 2023.
Public Domain