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by Wagner, Siegfried
by Wagner, Siegfried; Hanke, Werner; Bode, Arndt; et al.
by Kose, Volkmar; Kohlrausch, F.; Wagner, Siegfried
by Wagner, Siegfried; Steinmetz, Matthias; Bode, Arndt; et al.
by Pöchtrager, Siegfried; Wagner, Walter
by Siegfried Pöchtrager; Walter Wagner
by Wagner, Siegfried; Rist, Ulrich; Heinemann, Hans-Joachim; et al.