| Author | Titles | | 1.
| Arriola, Aimar | 1 | | 2.
| Arriola, Andreu | 1 | | 3.
| Arriola, Magali, 1970- | 5 | | 4.
| Arrivas, Fabio | 1 | | 5.
| Arrobas, José Manuel | 1 | | 6.
| Arrocha, Fernando | 1 | | 7.
| Arroio, António, 1856-1934 | 27 | | 8.
| Arroio, António José, 1856-1934 | 0 | | 9.
| Author is: Arroio, António, 1856-1934 | 27 | | 10.
| Arroio, Fernando | 1 | | 11.
| Arroio, João, 1861-1930 | 5 |
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