# Theo Hardenberg
**Wikidata**: [Q134610232](https://www.wikidata.org/wiki/Q134610232)  
**Source**: https://4ort.xyz/entity/theo-hardenberg


## References

1. [Honnefer Volkszeitung. 1975](https://zeitpunkt.nrw/ulbbn/periodical/zoom/4358926?query=%22Theo%20Hardenberg%22)
2. [Honnefer Volkszeitung. 1974](https://zeitpunkt.nrw/ulbbn/periodical/zoom/4357076?query=%22Theodor%20Hardenberg%22)
3. [Source](https://nrw.digibib.net/search/hbzvk/record/(DE-605)TT001733969?be-hbzvk-sort=relevance&q-al=Theo+hardenberg+siebengebirge&start=1&count=20&hitcount=6&pos=1)
4. Integrated Authority File