# Maske in Blau

> operetta by Fred Raymond

**Wikidata**: [Q1907144](https://www.wikidata.org/wiki/Q1907144)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Maske_in_Blau)  
**Source**: https://4ort.xyz/entity/maske-in-blau


## References

1. MusicBrainz