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Fotothek df tg Astronomie Sternkarte Messinstrument. Scan Deutsche Fotothek dftg color MIKCenter Berlin GmbH Abbildung Nr Oppenheim Astrolabium Papier Holzschnitt cm Astronomie Sternkarte Messinstrument ppn Druck Deutsche Fotothek gefrdert von der Deutschen Forschungsgemeinschaft Projekt Technikgeschichte Jh Verwalter Dresden