United States. Bureau of Labor Statistics. "June 1968," The Employment Situation (July 10, 1968). https://fraser.stlouisfed.org/title/144/item/496937, accessed on September 24, 2023.
Public Domain
United States. Bureau of Labor Statistics. "June 1968," The Employment Situation (July 10, 1968). https://fraser.stlouisfed.org/title/144/item/496937, accessed on September 24, 2023.
Public Domain