# Otto Martens
**Wikidata**: [Q95259320](https://www.wikidata.org/wiki/Q95259320)  
**Source**: https://4ort.xyz/entity/otto-martens-q95259320


## References

1. Catalog of the German National Library
2. Integrated Authority File
3. [Source](https://weber-gesamtausgabe.de/de/A009814.html)