| Author | Titles | | 1.
| Cohrs, Paul, 1897- ? | 1 | | 2.
| Coia, Raffaella | 1 | | 3.
| Cóias, Inês, 1976- | 3 | | 4.
| Cóias, João, 1958- | 1 | | 5.
| Coignard, Jérôme | 24 | | 6.
| Coignet, C. | 2 | | 7.
| Coignet, Pierre | 1 | | 8.
| Coignet, Rémi | 1 | | 9.
| Coilly, Nathalie, 1976- | 2 | | 10.
| Coimbra 2003. Capital Nacional da Cultura | 4 |
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