United States. Bureau of Labor Statistics , Glass, Ronald W. and Korpi, John David. Municipal Public Employee Associations : Bulletin of the United States Bureau of Labor Statistics, No. 1702 , Washington, D.C: For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1971, https://fraser.stlouisfed.org/title/4785, accessed on November 17, 2024.