| Author | Titles | 1.
| Clausen, Barbara | 2 | 2.
| Clausen, Ernst | 1 | 3.
| Clausen, George, 1852-1944 | 3 | 4.
| Clausen, Magnus Frederik, 1981- | 1 | 5.
| Clausen, Magnus Thorø | 1 | 6.
| Clausse, Gustave | 1 | 7.
| Claussen, Peter Cornelius | 1 | 8.
| Claustre, Barbara M. | 1 | 9.
| Claustres, Annie | 1 | 10.
| Clavaguera, C. U. | 1 |
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