El acero libertario (1937)
- Genre: Documentary
- Release Date: 1937-01-01
- Runtime: 1h 36min
- Production Company: S.I.E. Films
- Director: Ramón de Baños
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| Directing | Ramón de Baños | Director |
| Crew | Arthur Porchet | Cinematography |
| Writing | Les | Writer |
