| Verfasser | Häufigkeit |
| Youngdahl, William E. |
2 |
| Cawood, Elize |
1 |
| Lenz, Jakob Michael Reinhold 1751-1792 |
1 |
| Moran, Robert T. |
1 |
| Moran, Robert T. 1938- |
1 |
| Reiss, Hans S. |
1 |
| Rensburg, Manie van 1945-1993 |
1 |
| Weyers, Marius |
1 |
| Yates, W. E. |
1 |
| Yuill, William E. 1921-1997 |
1 |