# Leo Kayser
**Wikidata**: [Q51559993](https://www.wikidata.org/wiki/Q51559993)  
**Source**: https://4ort.xyz/entity/leo-kayser


## References

1. [Web umenia](https://www.webumenia.sk/autor/4791)
2. [online catalogue of Huis van het boek. 1907](https://mmm-web.adlibhosting.com/AIS6/Details/collect/7562429)
3. Web umenia
4. LIBRIS
5. NUKAT
6. Virtual International Authority File