The Microform Research Collections at Boston Spa - Index of Subset U
- 205. United States Army in the World War, 1917-1919.
- United States Presidential papers: the papers of 23 presidents held by the Manuscript Division of the Library of Congress.
- Unpublished State Papers of the English Civil War and Interregnum, filmed in the Public Record Office. covers 17th century. parts 1-5.
- The Upcott Collection of Literary Autographs, (1765-1830).
- Urban and Rural Social Conditions in industrial Britain. series 1 and 2.