Un fleuve invisible (2019)
- Genre: Documentary
- Release Date: 2019-04-11
- Runtime: 1h 36min
- Language: Français
- Production Company: Längengrad
- Director: Serge Dumont
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| Sound | Amaury Chabauty | Music |
| Writing | Frank Nischk | Writer |
| Art | Stéphane Potier | Graphic Designer |
| Writing | Serge Dumont | Writer |
| Editing | Isabelle Albert | Editor |
| Directing | Serge Dumont | Director |
| Art | Jean-Luc Weimar | Graphic Designer |
| Production | Frank Nischk | Producer |
| Production | Katja Sträter | Production Director |
| Camera | Serge Dumont | Director of Photography |
| Production | Agnès Divoux | Production Director |
| Production | Ingrid Eckerle | Production Director |
