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Galenson 1956, p. 34. Galenson, Walter (1956). "The Unionization of the American Steel Industry". International Review of Social History. 1: 8–40. doi:10.1017/S0020859000000560.
Knoedler 1993, p. 106. Knoedler, Janet (1993). "Market Structure, Industrial Research, and Consumers of Innovation: Forging Backward Linkages to Research in Turn-of-the-Century U.S. Steel Industry". The Business History Review. 67 (1). doi:10.2307/3117469. JSTOR3117469.
Knoedler 1993, p. 110. Knoedler, Janet (1993). "Market Structure, Industrial Research, and Consumers of Innovation: Forging Backward Linkages to Research in Turn-of-the-Century U.S. Steel Industry". The Business History Review. 67 (1). doi:10.2307/3117469. JSTOR3117469.
nwisteelheritagemuseum.org
Leichenko, Patricia; Kroll, Dorothy; Ingram, Frederick C. (2009). "The Modern History of Inland Steel". Northwest Indiana Steel Heritage Project. Archived from the original on 25 January 2010.
Leichenko, Patricia; Kroll, Dorothy; Ingram, Frederick C. (2009). "The Modern History of Inland Steel". Northwest Indiana Steel Heritage Project. Archived from the original on 25 January 2010.