| Author | Titles | | 1.
| Uribe, Kirmen | 1 | | 2.
| Uriburu, Nicolás, 1937- | 1 | | 3.
| Uriburu, Nicolás García, 1937- | 0 | | 4.
| Author is: Uriburu, Nicolás, 1937- | 1 | | 5.
| Uricchio, William | 1 | | 6.
| Uriel, Antonio | 1 | | 7.
| Uriel, Belén, 1974- | 2 | | 8.
| Ürkmez, Basak | 1 | | 9.
| Url, Martin | 1 | | 10.
| Urlichs, Heinrich Ludwig, 1864- | 1 | | 11.
| Urlichs, Heinrich Lydwig, 1864- | 0 | | 12.
| Author is: Urlichs, Heinrich Ludwig, 1864- | 1 |
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