| Verfasser | Häufigkeit |
| Salutati, Coluccio 1331-1406 |
13 |
| Ullman, Berthold L. |
12 |
| Ullman, B. L. |
7 |
| Cummings, Stephen |
5 |
| Ullman, Dana 1951- |
5 |
| Ellis, Willis A. |
3 |
| Hegardt, Joh. Lech |
3 |
| Höckert, Carolus Em |
3 |
| Ullman, Daniel B. 1918-1979 |
3 |
| Ullman, Joseph C. |
3 |
| Ullman, Magnus 1762-1826 |
3 |
| Ullman, Tracey 1959- |
3 |
| Chang, Edward |
2 |
| Phillips, Steven J. |
2 |
| Ullman, Chana |
2 |
| Ullman, Jeffrey D. 1942- |
2 |
| Ullman, Joan C. |
2 |
| Ullman, Joan Connelly |
2 |
| Agard, Walter R. |
1 |
| Alexander, Ruth |
1 |