Contents
| Page | Type | Kind | Title | Author(s) |
|---|---|---|---|---|
| 2 | Short Fiction | Fiction | Seguros interestelares | Kendell Foster Crossen |
| 36 | Short Fiction | Fiction | ¿Cómo es Marte? | Edmond Hamilton |
| 52 | Short Fiction | Fiction | Abril en Canterbury | Raymond F. Jones |
| 84 | Short Fiction | Fiction | No hay tierra de Nod | Sherwood Springer |
| 98 | Short Fiction | Fiction | El planeta paradójico | Roger Dee |
| 109 | Essay | Non Fiction | Inquietudes de la ciencia | Judith Merril |
| 114 | Short Fiction | Fiction | Lección de supervivencia | Frank Belknap Long, Jr. |
| 119 | Essay | Non Fiction | Un planeta puesto en duda | James Blish |
| 123 | Short Fiction | Fiction | El robot sentimental | Alfred Coppel |
| Page | Type | Kind | Title | Author(s) |
|---|---|---|---|---|
| Editor | Non Fiction | Enigmas - 1956 | Bernardino Diaz | |
| Cover Art | Non Fiction | Enigmas, Num. 7 | Earle K. Bergey |