United States. Bureau of Labor Statistics. "Proceedings of the Thirteenth Annual Convention of the Association of Governmental Labor Officials of the United States and Canada: Held at Columbus, Ohio, June 7-10, 1926 : Bulletin of the United States Bureau of Labor Statistics, No. 429," Proceedings of the ... Annual Convention of the Association of Governmental Labor Officials of United States and Canada (January 1927). https://fraser.stlouisfed.org/title/3907/item/493136, accessed on March 13, 2025.