| Author | Titles | | 1.
| Costello, D. P. | 1 | | 2.
| Costello, Diarmuid | 3 | | 3.
| Costello, Edward | 1 | | 4.
| Costello, Roberto | 1 | | 5.
| La Coste-Messelière, Marie-Geneviève de, 1925-2004 | 5 | | 6.
| La Coste-Messelière, Pierre de, Marquês de, 1894-1975 | 1 | | 7.
| Coster, Charles de, 1827-1879 | 0 | | 8.
| Author is: De Coster, Charles, 1827-1879 | 3 | | 9.
| Coster, Charles Théodore Henri de, 1827-1879 | 0 | | 10.
| Author is: De Coster, Charles, 1827-1879 | 3 | | 11.
| Coster, Germaine de | 1 | | 12.
| Costermans, Barbara | 2 |
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