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- Johnson, Emory R. Government Regulation of Transportation (1938) online edition
- Martin, Albro. Enterprise Denied: Origins of the Decline of American Railroads, 1897-1917 (1978)
- Morris, Edmund. Theodore Rex (2002), biography of Roosevelt excerpt and text search
- Sharfman, Isaiah Leo. Railway Regulation Railway Regulation (1915) complete edition online
- Stone, Richard D. The Interstate Commerce Commission and the Railroad Industry: A History of Regulatory Policy Praeger 1991 online edition
- The Letters of Theodore Roosevelt. Vol. V: The Big Stick, 1905-1907 edited by Elting E. Morison (1952)