United States. Bureau of Labor Statistics. "May 1966," The Employment Situation (June 6, 1966). https://fraser.stlouisfed.org/title/144/item/496912, accessed on February 19, 2019.
Public Domain
United States. Bureau of Labor Statistics. "May 1966," The Employment Situation (June 6, 1966). https://fraser.stlouisfed.org/title/144/item/496912, accessed on February 19, 2019.
Public Domain