| Verfasser | Häufigkeit |
| Palay, Sanford L. 1918-2002 |
3 |
| Peters, Alan 1929- |
3 |
| Webster, Henry deF |
3 |
| Webster, Henry deF. 1927- |
3 |
| °Aström, Karl E. |
2 |
| Guynes, Sean A. |
1 |
| Hassler-Forest, Dan 1973- |
1 |
| Palay, Sanford L. |
1 |
| Peters, Alan |
1 |
| Webster, Henry de F. |
1 |
| Åström, Karl Erik |
1 |