{"id":"000500499","type":"article","title":"Ukrepitelnata sistema na Abritus. (Bulg.) Le système de fortification d'Abrittus","pages":"18-32","container-title":"Archeologija. Organ na Archeologičeskija institut i muzej pri Bălgarskata akademija na naukite, 8,4.1966","author":[{"family":"Ivanov","given":"Teofil."}],"issued":{"raw":"1966"}}