
Margreet Honig – Der freie Ton
- ឆ្នាំ: 1970
- ប្រទេស:
- ប្រភេទ: Documentary
- ស្ទូឌីយោ:
- ពាក្យគន្លឹះ: singing lessons, vocal coach
- នាយក: Stefan Haupt
- ខាស: Margreet Honig, Hans Adolfsen, Magdalena Kožená, Rafael Oliveira Gonçalves, Eszter Gyüdi, Gerben van der Werf