Martin Pfeiffer, Achim Bethe, M.Eng., Catharina Philine Pfeiffer, M.Sc.,
Peter Henseler, Andreas Kern, Esther Pfeiffer,
Martin Pfeiffer, Achim Bethe, Catharina Philine Pfeiffer,
Robert Schmitt, Tilo Pfeifer,
Joachim Pfeffer,
Werner Helm, Andreas Pfeifer, Joachim Ohser,