| Author | Titles | 1.
| Koelbl, Herlinde | 1 | 2.
| Koelbl, Herlinde, 1939- | 1 | 3.
| Koele, Ineke Alien | 1 | 4.
| Koelen, Dorothea van der | 1 | 5.
| Koella, Rudolf | 4 | 6.
| Koeller, Annette Bjorg | 1 | 7.
| Koeman, C. | 2 | 8.
| Koenders, Irène | 1 | 9.
| Koenig, G. M. | 1 | 10.
| Koenig, Giovanni Klaus | 1 |
|
|