{"id":"001066863","type":"book","title":"The four phases carbon - gas - slag - metal and their interaction in bloomery ironmaking","publisher":"Aarhus University Press","publisher-place":"Aarhus","pages":"195-201","container-title":"Prehistoric and medieval direct iron smelting in Scandinavia and Europe. Aspect of technology and science. Proceedings of the Sandbjerg Conference 16th to 20th september 1999","author":[{"family":"Espelund","given":"Arne"}],"issued":{"raw":"2003"}}