| Author | Titles | | 1.
| Bertra, Marie-Hélène | 1 | | 2.
| Bertram, 1340-1415 | 1 | | 3.
| Bertram, Anthony, 1897-1978 | 5 | | 4.
| Bertram, Ernst | 2 | | 5.
| Bertran, Lluís | 1 | | 6.
| Bertrand, Alexandre, 1820-1902 | 4 | | 7.
| Bertrand, Aloysius, 1807-1841 | 0 | | 8.
| Author is: Bertrand, Louis, 1807-1841 | 13 | | 9.
| Bertrand, Anne, 1966- | 5 | | 10.
| Bertrand, Ariana | 2 | | 11.
| Bertrand, Domingos | 2 |
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