Area Wage Survey: The Chicago, Illinois, Metropolitan Area, June 1972 : Bulletin of the United States Bureau of Labor Statistics, No. 1725-92
United States. Bureau of Labor Statistics. "Area Wage Survey: The Chicago, Illinois, Metropolitan Area, June 1972 : Bulletin of the United States Bureau of Labor Statistics, No. 1725-92," Area Wage Survey (1972). https://fraser.stlouisfed.org/title/4655/item/498867, accessed on May 13, 2024.