Proceedings of the Eighth Annual Meeting of the International Association of Industrial Accident Boards and Commissions. Held at Chicago, 111., September 19-23, 1921 : Bulletin of the United States Bureau of Labor Statistics, No. 304
International Association of Industrial Accident Boards and Commissions and United States. Bureau of Labor Statistics. "Proceedings of the Eighth Annual Meeting of the International Association of Industrial Accident Boards and Commissions. Held at Chicago, 111., September 19-23, 1921 : Bulletin of the United States Bureau of Labor Statistics, No. 304," Proceedings of the ... Annual Meeting of the International Association of Industrial Accident Boards and Commissions (August 1922). https://fraser.stlouisfed.org/title/3949/item/492987, accessed on April 19, 2024.