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Fotothek df tg Bergwerk Bergbau Verhttung Httenwesen Metallurgie Saigern Saigerhe. Creator Georgius Agricola Johann Becher Scan Deutsche Fotothek dftg color MIKCenter Berlin GmbH Frankfurt Main Scheiden von Silber durch Saigern Saigerherd Papier Holzschnitt cm Bergwerk Bergbau Verhttung Httenwesen Metallurgie Saigern