| Das Telefon in neuen Dimensionen (New dimensions in telephone communication), 2001, Autoren: Beate Johnen und Ute Wagner, BoD Verlag. |
| Life is a great adventure you only need the courage to live it. |
Helen Keller |
| Life is a great adventure you only need the courage to live it. |
Helen Keller |
| Das Telefon in neuen Dimensionen (New dimensions in telephone communication), 2001, Autoren: Beate Johnen und Ute Wagner, BoD Verlag. |