United States. Bureau of Labor Statistics and National Commission on Productivity. Improving Productivity: Labor Management Approaches : Bulletin of the United States Bureau of Labor Statistics, No. 1715 , Washington, D.C: For sale by the Supt. of Docs., U.S. Govt. Print. Off., September 1971, https://fraser.stlouisfed.org/title/4747, accessed on September 26, 2024.