{"id":"001033520","type":"book","title":"Vier Dinge verderben ein Bergwerk","publisher-place":"Bochum","pages":"93-102","container-title":"Man and mining - Mensch und Bergbau. Studies in honour of Gerd Weisgerber on occasion of his 65th birthday","author":[{"family":"Cierny","given":"Jan 1955-2006"}],"issued":{"raw":"2003"}}