| Author | Titles | 1.
| Url, Martin | 1 | 2.
| Urlichs, Heinrich Ludwig, 1864- | 1 | 3.
| Urlichs, Heinrich Lydwig, 1864- | 0 | 4.
| Author is: Urlichs, Heinrich Ludwig, 1864- | 1 | 5.
| Urquart, Rachel | 1 | 6.
| Urquart, Ross | 1 | 7.
| Urquhart, Donald, 1959- | 1 | 8.
| Urquidi, Marina | 1 | 9.
| Urrabieta Ortiz y Vierge, Daniel, 1851-1904 | 0 | 10.
| Author is: Vierge, Daniel, 1851-1904 | 2 | 11.
| Urraca Uribe, Susana | 2 | 12.
| Urrea Fernandez, Jesus | 4 |
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