| Verfasser | Häufigkeit |
| Drozdowski, Mariusz Robert 1971- |
7 |
| De Maria, Robert |
5 |
| Dutton, Michael Robert 1957- |
5 |
| De Mott, Robert |
4 |
| Dawson, Mary R. |
3 |
| Diot, Jean-Robert |
3 |
| Diot-Duriatti, Marie-Renée |
3 |
| La Marck, Robert de |
3 |
| Lalande, Michel-Richard de 1657-1726 |
3 |
| MacConnell Robert D. |
3 |
| Walczak, Wojciech 1980- |
3 |
| Ballou, Jonathan D. 1954- |
2 |
| Drompp, Michael Robert 1953- |
2 |
| Du Caurroy, Eustache 1549-1609 |
2 |
| Dudash, Michele R. |
2 |
| Eldridge, Mark D. B. |
2 |
| Fenster, Charles B. |
2 |
| Frankham, Richard 1942- |
2 |
| Krishtalka, Leonard |
2 |
| Lacy, Robert C. |
2 |