{"id":"001033529","type":"book","title":"Der Markgräfler Jaspis","publisher-place":"Bochum","pages":"215-225","container-title":"Man and mining - Mensch und Bergbau. Studies in honour of Gerd Weisgerber on occasion of his 65th birthday","author":[{"family":"Kaiser","given":"Michael J."}],"issued":{"raw":"2003"}}