United States. Bureau of Labor Statistics. "March 1967," The Employment Situation (April 11, 1967). https://fraser.stlouisfed.org/title/144/item/496922, accessed on September 27, 2023.
Public Domain
United States. Bureau of Labor Statistics. "March 1967," The Employment Situation (April 11, 1967). https://fraser.stlouisfed.org/title/144/item/496922, accessed on September 27, 2023.
Public Domain