Authors: w
- Tyler, William N. (William Nelson) 1838-1910
- Tyler, Winsor Marrett 1876-1954
- Tymms, W. R. (William Robert) -
- Tyndale, Walter 1855-1943
- Tyndale, William 1492-1536
- Tyrrell, J. W. (James Williams) 1863-1945
- Tyrrell, T. W. -
- Ukers, William H. (William Harrison) 1873-1945
- Ullswater, James William Lowther, Viscount 1855-1949
- Uminski, Wladyslaw 1865-1954
- Umphrey, G. W. (George Wallace) 1878-
- Underwood, Edna Worthley 1873-1961
- United States. Army Air Forces -
- United States. Army. Signal Corps -
- United States. Bureau of Commercial Fisheries -
- United States. Congress. Joint Committee on the Conduct of the War -
- United States. Council of National Defense. Committee on Labor. Section on Industrial Training for the War Emergency -
- United States. Office of Education -
- United States. War Department -
- United States. War Department. Division of Military Aeronautics -
- United States. War Department. General Staff -
- United States. Warren Commission -
- United States. Work Projects Administration -
- Upham, Charles Wentworth 1802-1875
- Upham, William P. (William Phineas) 1836-1905
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