| Verfasser | Häufigkeit |
|---|---|
| Tizard, Jack | 7 |
| Tizard, T. H. | 4 |
| Wild, J. J. | 4 |
| Grad, Jacqueline C. | 2 |
| Burchell, Bebb | 1 |
| King, Roy D. | 1 |
| Mortimore, Jo | 1 |
| Moss, Peter 1945- | 1 |
| O'Connor, N. | 1 |
| Perry, Jane | 1 |
| Raynes, Norma V. | 1 |
| Tizard, Barbara | 1 |
| Tizard, J. | 1 |
| Tizard, John | 1 |
| Walker, David | 1 |