| Author | Popularity |
| Allan H. White |
2 |
| Andrew M. Poulton |
2 |
| Benjamin Buckley |
2 |
| Brian W. Skelton |
2 |
| Edward P. Sampler |
2 |
| Harry Heaney |
2 |
| Jonathan Y. Boxhall |
2 |
| Kathryn E. Holmes |
2 |
| Mark Elsegood |
2 |
| Matthew J. McGrath |
2 |
| Matthew J. McIldowie |
2 |
| Mauro Mocerino |
2 |
| Philip C. Bulman Page |
2 |
| Vickie McKee |
2 |
| Yohan Chan |
2 |
| British Institute of Mental Handicap |
1 |
| Colman McGrath |
1 |
| Cynthia K.Y. Yiu |
1 |
| Grant, Gordon |
1 |
| H.M. Wong |
1 |
| Humphreys, Stuart |
1 |
| McGrath, J. H. |
1 |
| McGrath, Morag |
1 |
| Olga Zayts |
1 |
| Paul Drew |
1 |
| Susan Bridges |
1 |
| T.K.F. Au |
1 |