United States. Bureau of Labor Statistics and International Association of Public Employment Services. "Proceedings of the Fifteenth Annual Meeting of the International Association of Public Employment Services: Held at Detroit, Mich., October 25-28, 1927 : Bulletin of the United States Bureau of Labor Statistics, No. 478," Proceedings of the Annual Meeting of the International Association of Public Employment Services (1928). https://fraser.stlouisfed.org/title/4022/item/493207, accessed on October 13, 2024.