| Author | Titles | | 1.
| Negretti, Giampiero | 1 | | 2.
| Negri, Ada, 1870-1945 | 3 | | 3.
| Negri, Anna Maria | 1 | | 4.
| Negri, Antonello, 1947- | 4 | | 5.
| Negri, Giorgio G. | 1 | | 6.
| Negri, Renata | 2 | | 7.
| Negri, Toni | 1 | | 8.
| Négrier, General de, 1839-1913 | 1 | | 9.
| Negro, Álvaro | 1 | | 10.
| Negro, Álvaro, 1973 - | 2 |
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