{"id":"001340976","type":"article","title":"Distinguishing amber and copal classes by proton magnetic resonance spectroscopy","publisher":"Oxford University, Research Laboratory for Archaeology and the History of Art","publisher-place":"Oxford","pages":"332-348","container-title":"Archaeometry, 54,2 (2012","author":[{"family":"Lambert","given":"J. B."}],"issued":{"raw":"2012"}}