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Fotothek df tg Astronomie Planet Messgert. Scan Deutsche Fotothek dftg color MIKCenter Berlin GmbH Abbildung Wrzburg Nrnberg Planetensystem Figur Amillarsphre Figur Papier Kupferstich cm Astronomie Planet Messgert ppn Druck Deutsche Fotothek gefrdert von der Deutschen Forschungsgemeinschaft Projekt Technikgeschichte Jh