{"id":"001177882","type":"book","title":"Grad Šumen, kulturno središte prez kăsnoto srednovekovie. Schumen, Mittelpunkt der Kultur im späten Mittelalter","pages":"43-45","container-title":"Godišnik na Muzeite ot Severna Bălgarija, 16 (1990","author":[{"family":"Antonova","given":"Vera Jankova 1917-2002"}],"issued":{"raw":"1990"}}