{"id":"000988101","type":"book","title":"Quarzit, Feuerstein, Hornstein, Jaspis, Ocker - mineralische Rohstoffe der Steinzeit","publisher":"Theiss","publisher-place":"Stuttgart","pages":"24-34","container-title":"Alter Bergbau in Deutschland","author":[{"family":"Weisgerber","given":"Gerd 1938-2010."}],"issued":{"raw":"1993"}}