| Verfasser | Häufigkeit |
| Thomas, Robert Bailey |
29 |
| Bailey, Robert W. |
15 |
| Bailey, Robert G. 1939- |
11 |
| Bailey, Henry J. |
9 |
| Bailey, Robert |
8 |
| Hursh, Robert D. |
8 |
| Thomas, Robert Bailey 1766-1846 |
8 |
| Bailey, Robert L. |
6 |
| Bailey, Robert 1983- |
5 |
| Atherton, David 1944- |
4 |
| Bailey, John 1942-2023 |
4 |
| Bailey, Norman 1933-2021 |
4 |
| Bailey, Robert C. |
4 |
| Hann, Robert G. |
4 |
| Allen, Thomas Sir 1944- |
3 |
| Bailey, Lynn |
3 |
| Harper, Heather 1930-2019 |
3 |
| Langridge, Philip 1939-2010 |
3 |
| Minton, Yvonne 1938- |
3 |
| Murray, Ann 1949- |
3 |