United States. Bureau of Labor Statistics.
Factbook for Estimating the Manpower Needs of Federal Programs : Bulletin of the United States Bureau of Labor Statistics, No. 1832 ,
Washington, D.C:
U.S. Dept. of Labor, Bureau of Labor Statistics,
1975, https://fraser.stlouisfed.org/title/4732,
accessed on April 16, 2025.
@FedFRASER