| Author | Titles | | 1.
| Ordieres Díez, Isabel | 1 | | 2.
| Ordine, N. | 1 | | 3.
| Ordine, Nuccio, 1958- | 1 | | 4.
| Ordish, Olive | 1 | | 5.
| Ordóñez Fernández, Rafael | 5 | | 6.
| Ordóñez Mora, Antonio | 1 | | 7.
| Ordóñez, Sergio | 1 | | 8.
| Ordoñez-Rey, Maria | 1 | | 9.
| Ordorica, Júlia | 2 | | 10.
| Ordovás, Julio José | 1 |
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