# Ludwig Friederichsen

> German geographer and publisher (1841–1915)

**Wikidata**: [Q106818](https://www.wikidata.org/wiki/Q106818)  
**Source**: https://4ort.xyz/entity/ludwig-friederichsen


## References

1. Catalog of the German National Library
2. BnF authorities
3. Integrated Authority File
4. Czech National Authority Database
5. [online image library Nederlands Fotomuseum](http://collectie.nederlandsfotomuseum.nl/fotografen/detail/fae0445d-76d4-e691-677c-590cbd2d35a7/media/?mode=detail&view=list&rows=1&page=440&sort=order_s_belang%20asc)
6. International Standard Name Identifier
7. Virtual International Authority File
8. CiNii Research
9. [Source](https://kalliope-verbund.info/DE-611-BF-110031)
10. World Biographical Information System Online
11. [BnF authorities](http://data.bnf.fr/ark:/12148/cb15241431n)
12. NMVW-collection website
13. online image library Nederlands Fotomuseum
14. [Wereldkaart waarop de kolen- en oliebunkerstations alsmede de kolen- en olievelden zijn aangegeven](https://n2t.net/ark:/33862/collect/573854)
15. National Library of Israel Names and Subjects Authority File