| Verfasser | Häufigkeit |
| Groff, Lauren 1978- |
9 |
| Jacobs, Stefanie 1981- |
5 |
| Groff, Silvano |
3 |
| Schwaab, Judith 1960- |
3 |
| DeGroff, Morgan ca. 20. Jh |
2 |
| Groff, James L. |
2 |
| Bonnet, Senda |
1 |
| Borrelli, Luciano |
1 |
| Brinkmann, Robert 1961- |
1 |
| Cagol, Franco |
1 |
| Camp, Colleen 1953- |
1 |
| Chrest, Carol |
1 |
| Gamble Robinson, Peter ca. 20. Jh |
1 |
| Groff, Peter S. |
1 |
| Gropper, Sareen Annora Stepnick |
1 |
| Hausbergher, Mauro |
1 |
| Holbrook, John M. |
1 |
| Hunt, Sara M. |
1 |
| Jones, Timothy 1971- |
1 |
| Leaman, Oliver 1950- |
1 |