International Association of Governmental Labor Officials. Convention , United States. Bureau of Labor Statistics , United States. Division of Labor Standards and United States. Bureau of Labor Standards. "Labor Laws and Their Administration, 1939. Proceedings of the Twenty-Fifth Convention of the International Association of Governmental Labor Officials, Tulsa, Okla., September 1939 : Bulletin of the United States Bureau of Labor Statistics, No. 678," Labor Laws and Their Administration : Proceedings of the ... Convention of the International Association of Governmental Labor Officials (September 1939). https://fraser.stlouisfed.org/title/3962/item/494367, accessed on December 25, 2024.