United States. Bureau of Labor Statistics , Clark, Lindley D. (Lindley Daniel), 1862-1951 , Callahan, Daniel F. (Daniel Francis) and Sharkey, Charles F., 1894-. "Labor Legislation of 1915 : Bulletin of the United States Bureau of Labor Statistics, No. 186," Labor Legislation of 1912-32 (December 1915). https://fraser.stlouisfed.org/title/3905/item/476852, accessed on January 2, 2025.