Occupational Wage Survey: Pittsburgh, Pennsylvania, January 1961 : Bulletin of the United States Bureau of Labor Statistics, No. 1285-44
United States. Bureau of Labor Statistics. "Occupational Wage Survey: Pittsburgh, Pennsylvania, January 1961 : Bulletin of the United States Bureau of Labor Statistics, No. 1285-44," Occupational Wage Survey (April 1961). https://fraser.stlouisfed.org/title/4510/item/495892, accessed on April 17, 2024.