United States. Bureau of Labor Statistics , Nelson, Richard Rex , Pearson, Haney R. and Breneman, Donald L. Municipal Collective Bargaining Agreements in Large Cities : Bulletin of the United States Bureau of Labor Statistics, No. 1759 , Washington, D.C: For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1972, https://fraser.stlouisfed.org/title/4783, accessed on October 12, 2024.