Clark, Lindley D. (Lindley Daniel), 1862-1951 , Frincke, Martin C. and United States. Bureau of Labor Statistics. Workmen's Compensation Legislation of the United States and Canada : Bulletin of the United States Bureau of Labor Statistics, No. 272 , Washington, D.C: Government Printing Office, January 1921, https://fraser.stlouisfed.org/title/3888, accessed on November 22, 2024.