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Fotothek df tg Geometrie Vermessung Trigonometrie. Scan Deutsche Fotothek dftg color MIKCenter Berlin GmbH Abbildung Mnchen Putten bei Berechnungen der Trigonometrie Papier Kupferstich cm Geometrie Vermessung Trigonometrie ppn Druck Deutsche Fotothek gefrdert von der Deutschen Forschungsgemeinschaft Projekt Technikgeschichte