| Author | Titles | | 1.
| Costa, Xavier, activo 2014 | 7 | | 2.
| Costa, Xavier da, 1871-1941 | 0 | | 3.
| Author is: Costa, Luís Xavier da, 1871-1941 | 36 | | 4.
| Costa, Xavier da, frei | 1 | | 5.
| Costa, Zéluiz, 1957- | 1 | | 6.
| Costa, Zita | 1 | | 7.
| Costache, Larry A. | 1 | | 8.
| Costa-Jung, Sabine | 2 | | 9.
| Costakis, Georgi | 1 | | 10.
| Costales, Victor | 2 | | 11.
| Costallat, Benjamin | 1 |
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