| Author | Titles | | 1.
| Zab Design & Typography (Firma) | 1 | | 2.
| Zabala, Guillermo, pseud. | 0 | | 3.
| Author is: Logroño, Miguel, 1937-2009 | 16 | | 4.
| Zabala, Horacio | 2 | | 5.
| Zabala, Santiago, 1975- | 1 | | 6.
| Zabala y Lera, Pío, 1879- | 1 | | 7.
| Zabalbeascoa, Anatxu, 1966- | 7 | | 8.
| Zabalbeascoa Conca, Anatxu, 1966- | 0 | | 9.
| Author is: Zabalbeascoa, Anatxu, 1966- | 7 | | 10.
| Zabalbeascoa, Patrick | 1 | | 11.
| Zabaleta, Ignacio Zuloaga y, 1870-1945 | 0 | | 12.
| Author is: Zuloaga, Ignacio, 1870-1945 | 1 | | 13.
| Zabaleta, Rafael, 1907-1960 | 1 |
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