International Association of Public Employment Services. Seventeenth Annual Meeting, Philadelphia, Pa., September 24-27, 1929. Eighteenth Annual Meeting, Toronto, Canada, September 9-12, 1930 : Bulletin of the United States Bureau of Labor Statistics, No. 538
United States. Bureau of Labor Statistics and International Association of Public Employment Services. "International Association of Public Employment Services. Seventeenth Annual Meeting, Philadelphia, Pa., September 24-27, 1929. Eighteenth Annual Meeting, Toronto, Canada, September 9-12, 1930 : Bulletin of the United States Bureau of Labor Statistics, No. 538," Proceedings of the Annual Meeting of the International Association of Public Employment Services (1931). https://fraser.stlouisfed.org/title/4022/item/493209, accessed on April 26, 2024.
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