{"id":"001482745","type":"article","title":"Investigation of Mortar from Bulgaria Dated from 5th Century BC to 13 th Century AD","publisher":"NOUS Publishers","publisher-place":"Sofia","pages":"75-93","container-title":"Archaeologia Bulgarica, 20 (216","author":[{"family":"Lesigyarski","given":"D"}],"issued":{"raw":"2016"}}