# Holger Michael Klein
**Wikidata**: [Q106578816](https://www.wikidata.org/wiki/Q106578816)  
**Source**: https://4ort.xyz/entity/holger-michael-klein


## References

1. Catalog of the German National Library
2. Virtual International Authority File
3. NUKAT
4. LIBRIS
5. [Source](http://ci.nii.ac.jp/author/DA01687431?l=en)
6. CiNii Research
7. CONOR.SI
8. Czech National Authority Database
9. [Source](https://opac.si.cobiss.net/opac7/conor/62996067)