| Verfasser | Häufigkeit |
|---|---|
| Chapman, Christopher John | 3 |
| Abernethy, Andrew T. | 1 |
| Alvaré, Helen M. | 1 |
| Graul, E. J. | 1 |
| Hammond, Jeffrey B. 1975- | 1 |
| Troug, Emil | 1 |
| Verfasser | Häufigkeit |
|---|---|
| Chapman, Christopher John | 3 |
| Abernethy, Andrew T. | 1 |
| Alvaré, Helen M. | 1 |
| Graul, E. J. | 1 |
| Hammond, Jeffrey B. 1975- | 1 |
| Troug, Emil | 1 |