Area Wage Survey: The Cincinnati, Ohio-Kentucky-Indiana, Metropolitan Area, March 1968 : Bulletin of the United States Bureau of Labor Statistics, No. 1575-62
United States. Bureau of Labor Statistics. "Area Wage Survey: The Cincinnati, Ohio-Kentucky-Indiana, Metropolitan Area, March 1968 : Bulletin of the United States Bureau of Labor Statistics, No. 1575-62," Area Wage Survey (1968). https://fraser.stlouisfed.org/title/4655/item/498374, accessed on July 12, 2020.