Titus, C. O.
Tōkyō Teikoku Daigaku.
Toledo, Ann Arbor, and Grand Truck Railway.
Toledo, Ann Arbor, and North Michigan Railway Company.
Toledo, Cincinnati, and St. Louis Railroad Company.
Toledo, Peoria & Warsaw Railway.
Toledo, Wabash, and Great Western Railroad.
Tomkins, Calvin, 1858-1921.
Tomlinson, G. W. (George W.)
Toms, W. H. (William Henry), approximately 1700-approximately 1750.
Toner, Joseph M. (Joseph Meredith), 1825-1896.
Tong yong tu shu you xian gong si.
Tooker, M. W.
Toronto Lithographing Company.
Torres y Guerra, Alonso de.
Torres, Manuel Guirez de.
Torrey, Jason, 1772-1848.
Toudy, H. J.
Touring-Club de France.
Tower, Z. B. (Zealous Bates), 1819-1900.
Townsend & Dale.
Townsend, C. McD. (Curtis McDonald), 1856-1941.
Townsend, H. C.
Townsend, Louis R.
Tracy & Rutt
Trask, George R.
Traubel, M. H. (Morris H.), 1820-1897.
Trautwine, John C. (John Cresson), 1810-1883.
Travel and Hotel Bureau.
Treskot, Johann, 1719-1786.
Treveres, J. J.
Trimble, Isaac, 1802-1888.
Trine, Z. V.
Trout, John L.
Trudeau, Charles Laveau, approximately 1750-1816.
Tucker, M. G.
Tulloch, Ross W.
Tunis, W. E.
Tunison, E. L.
Turnbull, Wm. (William), 1800-1857.
Turner, James, -1759.
Turner, L. C.
Turner, W. J. (William John)
Tutor y Malo, Francisco.
Tuttle & Co. (Philadelphia, Pa.)
Tuttle Publishing Co. (1883-1957)
Tyndale, Hector, 1821-1880.
Tyrone and Lock Haven Railroad Company.
U.S. Army Topographic Engineering Center.
U.S. Coast and Geodetic Survey.
U.S. Customs Service.
Ubaldini, Petruccio, 1524?-1600?
Übelin, Georg, active 15th century-16th century.
Ulloa, Antonio de, 1716-1795.
Underwood & Underwood.
Union Lith. Co.
Union News Company (Boston, Mass.)
Union Pacific Railroad Company.
Union Pacific Railway Company.
Union and Advertiser Co.
United Confederate Veterans. Washington, D.C. Division. Charles Broadway Rouss Camp no. 1191.
United Fruit Company.
United Nations. Economic Commission for Africa.
United States Army of the Potomac
United States Army. Office of the Chief of Engineers.
United States Coast Survey.
United States Employment Service.
United States Exploring Expedition (1838-1842)
United States Military Academy.
United States Military Academy. Department of Military Art and Engineering.
United States Naval Observatory.
United States Sanitary Commission.
United States. Adjutant-General's Office. Military Information Division.
United States. Agency for International Development. Office of U.S. Foreign Disaster Assistance.
United States. Agricultural Research Service.
United States. Aircraft Squadrons.
United States. Army.
United States. Army Air Forces. Photo Reconnaissance Squadron, 8th.
United States. Army Map Service.
United States. Army of the Cumberland.
United States. Army of the Cumberland. Topographical Engineers Office.
United States. Army of the James.
United States. Army of the Potomac.
United States. Army of the Potomac. Engineer Brigade.
United States. Army of the Potomac. Engineer Department.
United States. Army of the Potomac. Engineer Dept.
United States. Army of the Potomac. Office of Surveys and Maps.
United States. Army. Air Corps.