| Author | Popularity |
| Box, M. J. |
1 |
| Brockington, David |
1 |
| Davies, D. |
1 |
| McLachlan, Donald L. |
1 |
| Mebrahtu, Teame |
1 |
| Royal Institute of International Affairs |
1 |
| Swann, Dennis, 1932- |
1 |
| Swann, Michael Swann, (Baron), 1920- |
1 |
| Swann, W. H. |
1 |
| White, Roger, 1948- |
1 |
| Youth Education Service |
1 |