United States. Bureau of Labor Statistics. "Wages and Hours of Labor in the Slaughtering and Meat-Packing Industry, 1921 : Bulletin of the United States Bureau of Labor Statistics, No. 294," Wages and Hours of Labor in the Slaughtering and Meat-Packing Industry (January 1922). https://fraser.stlouisfed.org/title/3926/item/476890, accessed on January 9, 2025.