| Author | Titles | | 1.
| Frei, Franziska | 1 | | 2.
| Frei Gil de Alcobaça, pseud. | 0 | | 3.
| Author is: Freire, João Paulo, 1885-1953 | 100 | | 4.
| Frei, Hans | 2 | | 5.
| Frei João das Chagas, pseud. | 0 | | 6.
| Author is: Ribeiro, Luciano, 1893-1969 | 21 | | 7.
| Frei, Marino, 19--?- | 1 | | 8.
| Frei Pinto de Almeida, Bernardo, 1954- | 0 | | 9.
| Author is: Almeida, Bernardo Pinto de, 1954- | 355 | | 10.
| Frei, Urs-Beat | 1 | | 11.
| Frei, Walter, 1882- ? | 2 | | 12.
| Freiberg, Jack | 1 | | 13.
| Freiberg, Jan | 1 |
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