# Friedrich Tietjen

> German astronomer (1832-1895)

**Wikidata**: [Q77051](https://www.wikidata.org/wiki/Q77051)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Friedrich_Tietjen)  
**Source**: https://4ort.xyz/entity/friedrich-tietjen


## References

1. Integrated Authority File
2. Mathematics Genealogy Project
3. Czech National Authority Database
4. Freebase Data Dumps. 2013
5. Virtual International Authority File
6. Treccani's Enciclopedia on line