| Author | Titles | | 1.
| Frías, Aníbal, 1964- | 1 | | 2.
| Frias, César de, 1894- ? | 9 | | 3.
| Frias, D. C. Sanches de | 3 | | 4.
| Frias, Eduardo, 1895-1975 | 4 | | 5.
| Related author: Claro, João V., pseud. | 7 | | 6.
| Frias, Eduardo 1895-1975 | 1 | | 7.
| Frias, Francisco | 1 | | 8.
| Frias, Hilda Moreira de | 5 | | 9.
| Frias, Miguel | 1 | | 10.
| Frias, Pedro de | 3 | | 11.
| Frias, Pedro J. | 1 |
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