| Author | Titles | | 1.
| Costa, Waldemar da, 1904-1982 | 16 | | 2.
| Costa, Walter | 1 | | 3.
| Costa, Xavier, 1914-1997 | 3 | | 4.
| Costa, Xavier, 1923-2006 | 0 | | 5.
| Author is: Costa Clavell, Xavier, 1923-2006 | 1 | | 6.
| Costa, Xavier, activo 2014 | 7 | | 7.
| Costa, Xavier da, 1871-1941 | 0 | | 8.
| Author is: Costa, Luís Xavier da, 1871-1941 | 36 | | 9.
| Costa, Xavier da, frei | 1 | | 10.
| Costa, Zéluiz, 1957- | 1 | | 11.
| Costa, Zita | 1 | | 12.
| Costache, Larry A. | 1 |
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