Keitt, Barbara L. and United States. Bureau of Labor Statistics. Occupational Employment in Selected Nonmanufacturing Industries : Bulletin of the United States Bureau of Labor Statistics, No. 2088 , Washington, D.C: U.S. Dept. of Labor, Bureau of Labor Statistics, March 1981, https://fraser.stlouisfed.org/title/4791, accessed on December 22, 2024.