United States. Interstate Commerce Commission 2,469 United States. Congress. House 1,558 United States. Congress. House. Committee on Interstate and Foreign Commerce 1,135 United States. Congress. Senate 1,017 United States. Congress 656 United States 585 United States. Congress. Senate. Committee on Interstate Commerce 575 United States. War Department 459 United States. Congress. Senate. Committee on Commerce 387 United States. Department of the Interior 335 United States. Bureau of Manufactures 312 United States. Congress. House. Committee on Public Lands 288 United States. Railway Mail Service 276 United States. Congress. House. Committee on Indian Affairs 246 United States. Department of the Treasury 238 United States. Bureau of Foreign Commerce 213 United States. Post Office Department 199 United States. Department of Commerce and Labor 184 United States. Department of State 180 United States. Congress. House. Committee on Military Affairs 172 Cartography Associates 163 David Rumsey Collection 163 United States. Congress. House. Committee on Claims 160 United States. Congress. House. Committee on Commerce 158 United States. Congress. Senate. Committee on Military Affairs 157 United States Railroad Labor Board 155 United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Railroads, Pipelines, and Hazardous Materials 154 United States. Congress. House. Committee on the District of Columbia 150 United States. General Accounting Office 150 United States. Congress. Senate. Committee on Commerce, Science, and Transportation 141 United States. Congress. House. Committee on the Judiciary 140 United States. Congress. Senate. Committee on Claims 131 United States. Federal Railroad Administration. Office of Research and Development 128 United States. Railroad Retirement Board 121 United States. Department of Commerce and Labor. Bureau of Statistics 120 United States. Congress. Senate. Committee on Public Lands 112 United States. Bureau of Foreign and Domestic Commerce 108 United States. Congress. Senate. Committee on the Judiciary 100 Brotherhood of Locomotive Engineers (U.S.) 97 United States. General Land Office 93 Brotherhood of Locomotive Firemen and Enginemen 92 United States. Congress. House. Committee on the Territories 92 Library of Congress. Congressional Research Service 91 United States. Congress. House. Committee on Transportation and Infrastructure 91 United States. Federal Railroad Administration 87 United States. Congress. Senate. Committee on the District of Columbia 85 United States. Army. Quartermaster Corps 83 United States. Congress. House. Committee on the Pacific Railroads 77 United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Railroads 74 United States. Government Accountability Office 74 United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Surface Transportation 71 Isthmian Canal Commission (U.S.) 70 Great Britain 69 United States. Congress. Senate. Committee on Interstate and Foreign Commerce 67 United States. War Department. Engineer Department 66 Roosevelt, Theodore, 1858-1919 65 United States. President (1901-1909 : Roosevelt) 65 United States. Congress. House. Committee on Interstate and Foreign Commerce. Subcommittee on Transportation and Commerce 64 United States. Congress. Senate. Committee on Indian Affairs 64 United States. Congress. Senate. Committee on Labor and Public Welfare 64 United States. Supreme Court 61 Pan American Union 59 United States. Congress. House. Committee on Territories 59 Rand McNally and Company 56 United States. Congress. House. Committee on Ways and Means 56 United States. Department of Justice 56 Association of American Railroads. Railroad Committee for the Study of Transportation 55 Mann, James Robert, 1856-1922 54 United States. Congress. Senate. Committee on Commerce. Subcommittee on Surface Transportation 53 International Bureau of the American Republics 52 United States. Congress. House. Committee on Interior and Insular Affairs 52 United States. Department of the Interior. Office of Indian Affairs (1849-1947) 52 United States. Congress. Senate. Committee on Public Lands and Surveys 51 Cleveland, Grover, 1837-1908 50 United States. National Transportation Safety Board 50 United States. President (1885-1889 : Cleveland) 50 Wheeler, Burton Kendall, 1882-1975 49 Sheppard, Morris, 1875-1941 48 Martin, Thomas Staples, 1847-1919 47 Staggers, Harley Orrin, 1907-1991 46 United States. Army. Corps of Engineers 46 Lauck, W. Jett (William Jett), 1879-1949 43 United States. Congress. Senate. Committee on Finance 43 United States. Congress. Senate. Committee on Territories 43 United States. National Mediation Board 43 United States. Congress. Senate. Committee on Labor and Public Welfare. Subcommittee on Railroad Retirement 42 Baltimore and Ohio Railroad Company 41 United States. Bureau of Mines 41 United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Surface Transportation and Merchant Marine 41 United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Surface Transportation and Merchant Marine Infrastructure, Safety, and Security 41 Nelson, Knute, 1843-1923 40 United States. Department of the Treasury. Bureau of Statistics 40 United States. Congress. House. Committee on Interstate and Foreign Commerce. Subcommittee on Transportation and Aeronautics 39 Canal Zone 38 National Research Council (U.S.). Transportation Research Board 38 Maine. Legislature. House of Representatives 37 Dale, Porter Hinman, 1867-1933 36 United States. Department of Transportation 36 United States. Congress. Senate. Committee on Railroads 35 United States. Department of the Navy 35