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by Vaihinger, Hans
by Lonnecker, Harald
by Lonnecker, Harald; Malettke, Klaus
by Rode, Franz Egon
by Schubert, Werner
by Amon, Pavlina; Teichgraber, Stephan-Immanuel
by Grabarek, Józef
by Roth, Thomas A.
by Brandis, Christian August