| Verfasser | Häufigkeit |
| Mandel, Willi |
7 |
| Ziegfeld, Arnold Hillen 1894-1964 |
7 |
| Hillen, Michiel W. |
3 |
| Hillen, Stefanie A. 1966- |
3 |
| Wolcott, Peter |
3 |
| Conway, David F. |
2 |
| Hillen, Wolfgang |
2 |
| Landis, Melodee |
2 |
| Schlegelmilch, Mary T. |
2 |
| Angus, M. |
1 |
| Bertram, Ralph 1975- |
1 |
| Diggins, Glen |
1 |
| Dähnhardt, Werner |
1 |
| Gray, Robert M. 1965- |
1 |
| Greenwald, Robert A. |
1 |
| Hillen, R. |
1 |
| Kolb, Martina |
1 |
| Lazareva, Aleksandra |
1 |
| Markwort, Helmut 1936- |
1 |
| Nelson, Mark |
1 |