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by Pfister, Hans-Rüdiger; Jungermann, Helmut; Fischer, Katrin
by Hans-Rüdiger Pfister; Helmut Jungermann; Katrin Fischer
by Jungermann, Helmut
by Jungermann, Helmut; Pfister, Hans-rudiger; Fischer, Katrin
by Jungermann, Helmut; Pfister, Hans-Rüdiger; Fischer, Katrin