United States. Bureau of Labor Statistics. "September 1968," The Employment Situation (October 9, 1968). https://fraser.stlouisfed.org/title/144/item/496940, accessed on January 16, 2021.
Public Domain
United States. Bureau of Labor Statistics. "September 1968," The Employment Situation (October 9, 1968). https://fraser.stlouisfed.org/title/144/item/496940, accessed on January 16, 2021.
Public Domain