United States. Bureau of Labor Statistics , Conference on Productivity (United States. Bureau of Labor Statistics), (1946 : Washington, D.C.) and Gody, Celia Star. Summary of Proceedings of Conference on Productivity, October 28-29, 1946 : Bulletin of the United States Bureau of Labor Statistics, No. 913 , Washington: G.P.O., 1947, https://fraser.stlouisfed.org/title/4357, accessed on December 21, 2024.