United States. Bureau of Labor Statistics. "Industry Wage Survey: Educational Institutions: Nonteaching Employees, October 1968 and March 1969 : Bulletin of the United States Bureau of Labor Statistics, No. 1671," Industry Wage Survey: Educational Institutions: Nonteaching Employees (1970). https://fraser.stlouisfed.org/title/4594/item/498654, accessed on October 3, 2024.