| Verfasser | Häufigkeit |
|---|---|
| Strobel, Gary A. | 3 |
| Mathre, Don E. | 2 |
| Aigner, Michael | 1 |
| Gary, Regina | 1 |
| Gerbitz, Armin | 1 |
| Gottmann, Anja | 1 |
| Maas, Stefanie | 1 |
| Mackensen, Andreas | 1 |
| Mautner, Josef | 1 |
| Moosmann, Andreas | 1 |
| Schaffer, Stefanie | 1 |
| Strobel, Julian | 1 |
| Thép-Mới 1925-1991 | 1 |
| Zimmermann, Robert | 1 |
| Zingsem, Jürgen | 1 |