| Verfasser | Häufigkeit |
| Billing, Edward |
11 |
| Billing, Einar 1871-1939 |
11 |
| Billing, Joan 1972- |
4 |
| Billing, Ehrenfried Heinrich -1835 |
3 |
| Billing, Tom 1973- |
3 |
| Eberli, Samuel 1972- |
3 |
| Flohr, Eckhard 1950- |
3 |
| Becker, Robert |
2 |
| Billing, Eve |
2 |
| Billing, Florian |
2 |
| Billing, Klaus 1910- |
2 |
| Engel, Felix B. |
2 |
| Sharkova, Maria |
2 |
| Vergarajauregui, Silvia |
2 |
| Wauschkuhn, Ulf 1963- |
2 |
| Adler, Boel 1959- |
1 |
| Alwin, Karl 1891-1945 |
1 |
| Anders, Peter 1941- |
1 |
| Balogh, Ernö 1897-1989 |
1 |
| Berg, Alban 1885-1935 |
1 |