Hookstadt, Carl, 1879-1924 and United States. Bureau of Labor Statistics. Comparison of Workmen's Compensation Laws of the United States and Canada Up to January 1, 1920 : Bulletin of the United States Bureau of Labor Statistics, No. 275 , Washington, D.C: Government Printing Office, September 1920, https://fraser.stlouisfed.org/title/3889, accessed on September 8, 2024.