El signo de los cuatro
| Format | Soft cover |
| Language | Spanish |
| Original Title | The sign of four |
| Original Language | English |
| Author | Arthur Conan Doyle |
| Format | Soft cover |
| Language | Spanish |
| ISBN | 84-96246-66-3 |
| DL (Spanish) | B-24.554-2004 |
Added by Eliisheba
| Format | Soft cover |
| Language | Spanish |
| Original Title | The sign of four |
| Original Language | English |
| Author | Arthur Conan Doyle |
| Format | Soft cover |
| Language | Spanish |
| ISBN | 84-96246-66-3 |
| DL (Spanish) | B-24.554-2004 |