| Verfasser | Häufigkeit |
| Invernizzi, Roberta 1966- |
43 |
| Peters, Roberta 1930-2017 |
31 |
| Alexander, Roberta 1949- |
22 |
| Mozart, Wolfgang Amadeus 1756-1791 |
19 |
| Stalberg, Ruth Roberta |
18 |
| Mameli, Roberta |
16 |
| Stewart, Roberta 1958- |
16 |
| Valtorta, Roberta 1952- |
15 |
| Feuerlicht, Roberta Strauss 1931-1991 |
14 |
| Serra, Roberta |
13 |
| Flexer, Abraham S. |
12 |
| Flexer, Roberta J. |
12 |
| Sevieri, Roberta |
12 |
| Spallone, Roberta |
12 |
| Söllner, Maria Anna |
12 |
| Costantino, Roberta |
11 |
| Metropolitan Opera Orchestra |
11 |
| Metropolitan Opera Chorus |
10 |
| Russell, Roberta S. |
10 |
| Spallone, Roberta 1975- |
10 |