{"id":"001028827","type":"book","title":"Towards the characteristics of the graphite ceramic ornamentation (from the later Copper Age in the Osum Valley, Central northern Bulgaria)","publisher":"Hedges","publisher-place":"Oxford","pages":"419-427","container-title":"Early symbolic systems for communication in Southeast Europe","author":[{"family":"Hristov","given":"Martin."}],"issued":{"raw":"2003"}}