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by Holtzendorff, Franz Von
by Meyer-Eppler, Irmgard
by Tamcke, Christoph
by Dräger, Andreas
by Schattner, Thomas
by Kuhlmann, Wilhelm; Czapla, Ralf Georg; Gruhl, Reinhard; et al.
by Taufer, Katrin
by D’Alembert, Jean Le Rond
by Rickert, Heinrich; Bast, Rainer A.
by Kronecker, Leopold