| Verfasser | Häufigkeit |
| Boyd, Robert Neilson |
22 |
| Morrison, Robert Thornton 1918-2010 |
17 |
| Morrison, Robert Thornton |
5 |
| New, T. R. |
2 |
| Thornton, I. W. B. |
2 |
| Freund, Silke |
1 |
| New, Tim R. 1943- |
1 |
| Niehoff, Maren R. 1963- |
1 |
| Thornton, Claus-Jürgen 1958- |
1 |
| Thornton, Ian W. B. |
1 |
| Tyrell, Eva |
1 |