Geheimakte Stimmbruch
| Series | Agent 327 |
| Publisher | Ehapa Verlag |
| Date | 1984 |
| Type | Comic Book, Softcover |
| Language | German |
| Artist | Martin Lodewijk |
| Author | Martin Lodewijk |
| Copyright Holder | Martin Lodewijk |
| Editor | Adolf Kabatek |
| Editor In Chief | Hansjürgen Meyer |
| Copyright Holder | Oberon bv |
| Printed By | Henri Proost & Co. |
| Genre | Humor |
| Published in | Germany |
| Collected Volume | 4 |
| Notes | Original Dutch title: Dossier Stemkwadrater |