Area Wage Survey: The Pittsburgh, Pennsylvania, Metropolitan Area, January 1972 : Bulletin of the United States Bureau of Labor Statistics, No. 1725-46
United States. Bureau of Labor Statistics. "Area Wage Survey: The Pittsburgh, Pennsylvania, Metropolitan Area, January 1972 : Bulletin of the United States Bureau of Labor Statistics, No. 1725-46," Area Wage Survey (1972). https://fraser.stlouisfed.org/title/4655/item/498822, accessed on April 18, 2024.