United States. Bureau of Labor Statistics. "National Survey of Professional, Administrative, Technical, and Clerical Pay: Private Service Industries, March 1987 : Bulletin of the United States Bureau of Labor Statistics, No. 2290," National Survey of Professional, Administrative, Technical, and Clerical Pay (December 1987). https://fraser.stlouisfed.org/title/4570/item/530789, accessed on October 3, 2024.