| Verfasser | Häufigkeit |
| Adams, Douglas 1952-2001 |
4 |
| Bell, Alan J. W. 1937- |
4 |
| Dickinson, Sandra |
4 |
| Dixon, David |
4 |
| Jones, Simon |
4 |
| Adams, Amy |
3 |
| Adams, Amy 1974- |
3 |
| Adams, Brooke |
3 |
| Adams, David K. |
3 |
| Bale, Christian |
3 |
| Jones, Peter |
3 |
| Robson, Dee |
3 |
| Rodgers, H. B. |
3 |
| Russell, David O. |
3 |
| Wing-Davey, Mark |
3 |
| Ackerman, Thomas E. |
2 |
| Adams, Brooke 1949- |
2 |
| Adams, Bryan 1959- |
2 |
| Adams, David B. 1950- |
2 |
| Adams, David Keith 1931- |
2 |