| Verfasser | Häufigkeit |
| Likens, Gene E. 1935- |
6 |
| Wetzel, Robert G. 1936-2005 |
6 |
| Lutz, Eckart Conrad 1951- |
4 |
| Thali, Johanna |
4 |
| Wetzel, René 1959- |
4 |
| Wetzel, Nina |
3 |
| Beckenbach, Malte |
2 |
| Dannheimer, W. |
2 |
| Eidinger, Lars 1976- |
2 |
| Keim, Joseph 1883-1973 |
2 |
| Reichart, Josef 1897-1987 |
2 |
| Walther, Rolf |
2 |
| Wetzel, Ed |
2 |
| Wetzel, Günter 1942- |
2 |
| Wetzel, Roland 1965- |
2 |
| Ahlers, Lisa Anette |
1 |
| Alberti, Augustus |
1 |
| Aschl, A. |
1 |
| Baecker, Antje |
1 |
| Barbour, Dave 1912-1965 |
1 |