{"id":"001177438","type":"book","title":"Nepublikuvani trakijski obekti v Severoiztočna Bălgaria. Unpublished Thracian sites in northeastern Bulgaria","publisher-place":"Sofija","pages":"147-150","container-title":"Helis, 1 (1992","author":[{"family":"Mateva","given":"B."}],"issued":{"raw":"1992"}}