# Otto Johannsen

> German engineer

**Wikidata**: [Q29566445](https://www.wikidata.org/wiki/Q29566445)  
**Source**: https://4ort.xyz/entity/otto-johannsen


## References

1. Czech National Authority Database
2. Virtual International Authority File
3. [Source](https://kalliope-verbund.info/DE-611-BF-112479)