{"id":"001250977","type":"book","title":"Opevněné postavení obléhatelů hradu Grabštejna. (Befestigte Position der Belagerer der Burg Grabštejn)","pages":"285-290","container-title":"Castellologica Bohemica, 9 (2004","author":[{"family":"Kypta","given":"Jan"}],"issued":{"raw":"2004"}}