# Martin Hallervord
**Wikidata**: [Q55901307](https://www.wikidata.org/wiki/Q55901307)  
**Source**: https://4ort.xyz/entity/martin-hallervord


## References

1. Czech National Authority Database
2. CERL Thesaurus
3. Catalog of the German National Library
4. VcBA (identifier)
5. MAK
6. Virtual International Authority File