Authors on U
- U.S. Arms Control and Disarmament Agency (1 books)
- U.S. Census of population and housing (1 books)
- Uchard, Mario (1 books)
- Udden, Johan August (1 books)
- Uhlrich, E. (1 books)
- Ukers, William H. (William Harrison), 1873-1945 (1 books)
- Ulfeldt, Leonora Christina (1 books)
- Ulmer, George T. (1 books)
- Unamuno, Miguel de, 1864-1936 (1 books)
- Underhill, Evelyn, 1875-1941 (3 books)
- Underhill, John Garrett (1 books)
- Underwood, Agnes S. (1 books)
- United States (3 books)
- United States Patent Office (1 books)
- United States Rubber Company (3 books)
- United States War Department (1 books)
- United States. Air Force (1 books)
- United States. Army. American Expeditionary Forces (1 books)
- United States. Army. Corps of Engineers. Manhattan District (2 books)
- United States. Bureau of the Census (2 books)
- United States. Central Intelligence Agency (16 books)
- United States. Congress. House. Committee on Homeland Security (1 books)
- United States. Congress. House. Committee on Science and Astronautics. (1 books)
- United States. Congress. Senate (1 books)
- United States. Council of National Defense. Highway Transport Committee (5 books)
- United States. Dept. of Defense (1 books)
- United States. Dept. of the Interior (2 books)
- United States. Dept. of the Interior. (1 books)
- United States. Executive Office of the President (1 books)
- United States. Federal Bureau of Investigation (2 books)
- United States. Navy Dept. Bureau of Ordnance (1 books)
- United States. Office of Civil Defense (1 books)
- United States. Presidents. (1 books)
- United States. Public Health Service (2 books)
- United States. Work Projects Administration (4 books)
- Universal House of Justice (4 books)
- University of Oxford. Faculty of Modern History (1 books)
- Unknown (113 books)
- Unknown, Various (1 books)
- Untermeyer, Louis, 1885-1977 (1 books)
- Upham, Charles Wentworth, 1802-1875 (2 books)
- Upham, William P. (William Phineas), 1836-1905 (1 books)
- Upton, Bertha (1 books)
- Upton, George P. (George Putnam), 1834-1919 (3 books)
- Upward, Allen, 1863-1926 (4 books)
- Urann, Clara A. (1 books)
- Urban, Emil K. (1 books)
- Urban, Helen M. (1 books)