{"id":"000771609","type":"book","title":"Vizantiĭski i bŭlgarski kreposti V-X vek","publisher":"Izd-vo na Bŭlgarskata akademii͡a na naukite","publisher-place":"Sofii͡a","author":[{"family":"Ovcharov","given":"Dimitŭr."}],"issued":{"raw":"1982"}}