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Fotothek df tg Akustik Schall Reflexion Musikintrument Ordensliteratur. Scan Deutsche Fotothek dftg color MIKCenter Berlin GmbH Ellwangen Reflexion des Schalls in einem gekrmmten Hohlkrper Horn Papier Holzschnitt cm Akustik Schall Reflexion Musikintrument Ordensliteratur ppn Druck Deutsche Fotothek gefrdert von der Deutschen