| Verfasser | Häufigkeit |
| Boussabaine, Halim A. |
2 |
| Bowman, Alan K. 1944- |
2 |
| Crowther, Charles ca. 20./21. Jh |
2 |
| Kirkham, Richard J. |
2 |
| Kirkham, Ruth |
2 |
| Pybus, John |
2 |
| Daw, Majorie |
1 |
| Dwan, Allan |
1 |
| Fairbanks, Douglas |
1 |
| Jones, Andy M. |
1 |
| Kirkham, Alex |
1 |
| Kirkham, Graeme 1949- |
1 |
| Kirkham, Kathleen |
1 |
| Lyle, E. P. jr |
1 |
| McClung, Hugh |
1 |
| Sauer, Rodney |
1 |
| Thorpe, Harris |
1 |
| Woodhouse, C. R. J. |
1 |