# Karl Heckel

> born 1858; died 1923

**Wikidata**: [Q60448649](https://www.wikidata.org/wiki/Q60448649)  
**Source**: https://4ort.xyz/entity/karl-heckel-q60448649


## References

1. Deutsche Biographie
2. Integrated Authority File
3. [Source](https://kalliope-verbund.info/DE-611-BF-109370)
4. Open Library
5. datos.bne.es
6. National Library of Portugal
7. [Source](https://openlibrary.org/works/OL4821999A)
8. [Source](http://datos.bne.es/persona/XX966324.html)
9. [Source](https://www.gutenberg.org/browse/authors/h#a48911)
10. National Library of Israel Names and Subjects Authority File