United States. Bureau of Labor Statistics. "Wages and Hours of Labor in the Iron and Steel Industry, 1907 to 1913 : Bulletin of the United States Bureau of Labor Statistics, No. 168," Wages and Hours of Labor in the Iron and Steel Industry in the United States (April 1915). https://fraser.stlouisfed.org/title/3923/item/476887, accessed on December 3, 2024.