United States. Bureau of Labor Statistics. "April 1967," The Employment Situation (May 9, 1967). https://fraser.stlouisfed.org/title/144/item/496923, accessed on September 27, 2023.
Public Domain
United States. Bureau of Labor Statistics. "April 1967," The Employment Situation (May 9, 1967). https://fraser.stlouisfed.org/title/144/item/496923, accessed on September 27, 2023.
Public Domain