United States. Bureau of Labor Statistics. "September 1967," The Employment Situation (October 11, 1967). https://fraser.stlouisfed.org/title/144/item/496928, accessed on September 27, 2023.
Public Domain
United States. Bureau of Labor Statistics. "September 1967," The Employment Situation (October 11, 1967). https://fraser.stlouisfed.org/title/144/item/496928, accessed on September 27, 2023.
Public Domain