| Verfasser | Häufigkeit |
| Geck, Hinrich-Matthias |
7 |
| Petry, Günther |
7 |
| Geck, Elisabeth 1922- |
3 |
| Geck, Peter |
3 |
| Cichon, Michael |
2 |
| Geck, Hans-Peter |
2 |
| Geck, Philip 1987- |
2 |
| Pressler, Guido |
2 |
| Purdie, Rhiannon |
2 |
| Beyersdorfer, Paul |
1 |
| Geck, John A. |
1 |
| Geck, Martin 1936-2019 |
1 |
| Geck, Paul |
1 |
| Geck, Philip Jonathan |
1 |
| Geck, Walter H. |
1 |
| O’Neill, Rosemary |
1 |
| Panizza, Oskar 1853-1921 |
1 |
| Person, Nicolaus |
1 |
| Phillips, Noelle |
1 |
| Vetter, Isolde |
1 |