United States. Bureau of Labor Statistics , Fleming, Thomas F. and Oliver, Richard P. Methodology for Projections of Industry Employment to 1990 : Bulletin of the United States Bureau of Labor Statistics, No. 2036 , Washington, D.C: U.S. Dept. of Labor, Bureau of Labor Statistics, February 1980, https://fraser.stlouisfed.org/title/4780, accessed on November 25, 2024.