Hans Zimmermann ยท Heinz Zimmermann
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Speaking, Listening, Understanding: The Art of Conscious Conversation for Insight & Decision Making | 978-O-94O262-75-1 (O-94O262-75-4) | 1996 | Heinz Zimmermann |