# Zwölfergrat

> ridge prominence of Glatthorn in the Bregenz Forest Mountains or the Lechquellen Mountains in Vorarlberg, Austria

**Wikidata**: [Q21881715](https://www.wikidata.org/wiki/Q21881715)  
**Source**: https://4ort.xyz/entity/zw-lfergrat


## References

1. Bregenzerwaldgebirge, 1st edition, 1977
2. Geographic Information System of Vorarlberg
3. Bregenzerwald- und Lechquellengebirge, 1st edition, 2008
4. Lechquellengebirge, 1st edition, 1977
5. Sonny's LiDAR DTM1