United States. Bureau of Labor Statistics. "April 1978," The Employment Situation (May 5, 1978). https://fraser.stlouisfed.org/title/144/item/56098, accessed on May 8, 2024.
United States. Bureau of Labor Statistics. "April 1978," The Employment Situation (May 5, 1978). https://fraser.stlouisfed.org/title/144/item/56098, accessed on May 8, 2024.