| Verfasser | Häufigkeit |
| Nagel, Gudrun |
2 |
| Bonisolli, Franco 1938-2003 |
1 |
| Bruscantini, Sesto 1919-2003 |
1 |
| Freni, Mirella 1935-2020 |
1 |
| Gardelli, Lamberto 1915-1998 |
1 |
| Grosse-Bächle, Lucia |
1 |
| Hasselbusch, Gudrun |
1 |
| Nagel, Günter 1935- |
1 |
| Nagel, Hans-Dieter |
1 |
| Nagel, Wolfgang |
1 |
| Piave, Francesco Maria 1810-1876 |
1 |
| Schäfer, Gudrun |
1 |
| Schütze, Gudrun |
1 |
| Verdi, Giuseppe 1813-1901 |
1 |