United States. Bureau of Labor Statistics. "February 1968," The Employment Situation (March 12, 1968). https://fraser.stlouisfed.org/title/144/item/496933, accessed on September 27, 2023.
Public Domain
United States. Bureau of Labor Statistics. "February 1968," The Employment Situation (March 12, 1968). https://fraser.stlouisfed.org/title/144/item/496933, accessed on September 27, 2023.
Public Domain