O'Leary, Wesley Alvah, 1873-? , Prosser, Charles A. (Charles Allen), 1871-1952 , Winslow, Charles Henry, 1866- and United States. Bureau of Labor Statistics. Short-unit Courses for Wage Earners and a Factory School Experiment : Bulletin of the United States Bureau of Labor Statistics, No. 159 , Washington, D.C: Government Printing Office, April 1915, https://fraser.stlouisfed.org/title/3819, accessed on August 6, 2024.