{"id":"002017034","type":"article","title":"Abrupt increase of radiocarbon concentration in 660 BC in tree rings from Grabie Near Kraków (SE Poland)","publisher":"Cambridge University Press","publisher-place":"New York","pages":"1327-1335","container-title":"Radiocarbon, 61 (2019), 0033-8222","author":[{"family":"Rakowski","given":"Andrzej"},{"family":"Krąpiec","given":"Marek"},{"family":"Huels","given":"Matthias"}],"issued":{"raw":"2019"}}