# Ferdinand Osthelder
**Wikidata**: [Q55231805](https://www.wikidata.org/wiki/Q55231805)  
**Source**: https://4ort.xyz/entity/ferdinand-osthelder


## References

1. Catalog of the German National Library
2. [Source](https://books.google.com/books?id=kV9FAAAAcAAJ&pg=PA1)
3. [Source](https://books.google.com/books?id=WjxKAAAAcAAJ&pg=PA416)
4. [Source](https://books.google.com/books?id=bmJFAAAAcAAJ&pg=PA1)
5. [Source](https://books.google.com/books?id=W2FFAAAAcAAJ&pg=PA4)