| Verfasser | Häufigkeit |
| Gergen, Kenneth J. 1934- |
39 |
| Gergen, Kenneth J. |
9 |
| Gergen, Mary M. 1938-2020 |
8 |
| Deissler, Klaus G. |
2 |
| Frissen, Valerie |
1 |
| Graumann, Carl F. 1923- |
1 |
| Lammes, Sybille |
1 |
| Lange, Michiel de 1976- |
1 |
| Marlowe, David |
1 |
| Mul, Jos de 1956- |
1 |
| Padberg, Thorsten 1969- |
1 |
| Raessens, Joost 1960- |
1 |
| Zielke, Barbara |
1 |