| Author | Titles | | 1.
| Bettelheim, P. | 1 | | 2.
| Bettella, Andrea | 1 | | 3.
| Bettelle, Mario | 1 | | 4.
| Bettencourt, Ana Maria dos Santos, 1960- | 1 | | 5.
| Bettencourt, André | 1 | | 6.
| Bettencourt, António, 19--?- | 1 | | 7.
| Bettencourt, António, 19--?- | 1 | | 8.
| Bettencourt, E. A. de, 1825-1886 | 2 | | 9.
| Bettencourt, Edmundo de | 3 | | 10.
| Bettencourt, Edmundo de, 1899-1973 | 2 |
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