| Author | Titles | | 1.
| Costa, Celeste, 1939- | 1 | | 2.
| Costa, Célia | 1 | | 3.
| Costa, Céu, 1944- | 3 | | 4.
| Costa, Cincinnato da, 1866-1930 | 7 | | 5.
| Costa, Claúdia | 1 | | 6.
| Costa, Cláudia, 1966- | 1 | | 7.
| Costa Clavell, J., 1923-2006 | 0 | | 8.
| Author is: Costa Clavell, Xavier, 1923-2006 | 1 | | 9.
| Costa Clavell, Javier, 1923-2006 | 0 | | 10.
| Author is: Costa Clavell, Xavier, 1923-2006 | 1 | | 11.
| Costa Clavell, X., 1923-2006 | 0 | | 12.
| Author is: Costa Clavell, Xavier, 1923-2006 | 1 | | 13.
| Costa Clavell, Xavier, 1923-2006 | 1 |
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