| Verfasser | Häufigkeit |
| Bourdeau, Laurent |
7 |
| Gravari-Barbas, Maria 1961- |
7 |
| Robinson, Mike 1960- |
6 |
| Fergus, Thomas D. 1951- |
5 |
| Gordon, William M. 1933-2012 |
5 |
| Greenwood-Robinson, Maggie 1952- |
5 |
| Robinson, Olivia F. 1938- |
5 |
| Garner, Mike |
4 |
| Robinson, Benjamin Lincoln 1864-1934 |
4 |
| Robinson, Steve |
4 |
| Salvage, Ian |
4 |
| Gräfe, Markus |
3 |
| Klauber, Craig |
3 |
| Estes, Simon 1938- |
2 |
| Gielen, Michael 1927-2019 |
2 |
| Greenman, Jesse More |
2 |
| Greenman, Jesse More 1867-1951 |
2 |
| Heichele, Hildegard 1947- |
2 |
| Kleiner, Susan M. |
2 |
| Lauren, Mark 1972- |
2 |