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by Tschacher, Wolfgang; Bergomi, Claudia
by Baunach, Wolfgang; Tschacher, Manfred
by Tschacher, Wolfgang; Haken, Hermann
by Wolfgang Tschacher; Hermann Haken
by Tschacher, Wolfgang
by Tschacher, Wolfgang; Schiepek, Günter; Brunner, Ewald J.
by Schiepek, Günter; Tschacher, Wolfgang