Area Wage Survey: The Cincinnati, Ohio-Kentucky-Indiana, Metropolitan Area, March 1967 : Bulletin of the United States Bureau of Labor Statistics, No. 1530-56
United States. Bureau of Labor Statistics. "Area Wage Survey: The Cincinnati, Ohio-Kentucky-Indiana, Metropolitan Area, March 1967 : Bulletin of the United States Bureau of Labor Statistics, No. 1530-56," Area Wage Survey (1967). https://fraser.stlouisfed.org/title/4655/item/498252, accessed on July 12, 2020.