| Author | Popularity |
| Flor, Kathrin (Red.) |
5 |
| International Tracing Service |
5 |
| ITS - International Tracing Service (Internationaler Suchdienst) |
3 |
| Flor, Kathrin Red |
1 |
| IST - International Tracing Service (Internationaler Suchdienst) |
1 |
| Internationaler Suchdienst (ITS) Bad Arolsen |
1 |
| Neusüs, Verena Red |
1 |
