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Fotothek df tg Geografie Vermessung Instrument. Scan Deutsche Fotothek dftg color MIKCenter Berlin GmbH Titelseite Frankfurt Main Titelseite Halbkreiszirkelinstrument Papier Holzschnitt cm Geografie Vermessung Instrument ppn Druck Deutsche Fotothek gefrdert von der Deutschen Forschungsgemeinschaft Projekt Technikgeschichte