| Verfasser | Häufigkeit |
| Lampman, Evelyn Sibley |
17 |
| Sibley, Elbridge |
5 |
| Sibley, Edgar H. |
3 |
| Sibley, Emma |
3 |
| Ahlquist, Jon E. |
2 |
| Bailey, Derek 1930-2005 |
2 |
| Barnard, Edward Sibley |
2 |
| Ellis, Wendy |
2 |
| Elphick, Chris |
2 |
| Fonteyn, Margot 1919-1991 |
2 |
| Ganio, Denys |
2 |
| Jeppesen, Lis |
2 |
| Kelly, Desmond |
2 |
| Kent, Allegra 1937- |
2 |
| Khalfouni, Dominique |
2 |
| Maksimova, Ekaterina S. 1939-2009 |
2 |
| Mitchell, Arthur |
2 |
| Nureev, Rudolʹf Ch. 1938-1993 |
2 |
| Pontois, Noëlla 1943- |
2 |
| Samsova, Galina |
2 |