Croxton, Frederick C. (Frederick Cleveland), 1871-1960 and United States. Bureau of Labor Statistics. Wages and Hours of Labor in the Building and Repairing of Steam Railroad Cars: 1890 to 1912 : Bulletin of the United States Bureau of Labor Statistics, No. 137 , Washington, D.C: Government Printing Office, December 1, 1913, https://fraser.stlouisfed.org/title/3805, accessed on September 6, 2024.