| Author | Titles | | 1.
| Tzonis, A. | 16 | | 2.
| Tzonis, Alexander | 0 | | 3.
| Author is: Tzonis, A. | 16 | | 4.
| Tzorakis, George | 1 | | 5.
| Tzuculesco, Ion, 1910-1962 | 1 | | 6.
| U, Sue Moe, 1944- | 1 | | 7.
| Ubach i Nuet, Antoni, 1944- | 2 | | 8.
| Ubach, Marcè | 1 | | 9.
| Ubach, Marta, 1969- | 5 | | 10.
| Ubach, Mercè | 4 | | 11.
| Ubbelohde, Susan | 1 |
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