{"id":"000998023","type":"book","title":"Wał obronny 2 podgrodzia gnieźnieńskiego zespołu grodowego","publisher-place":"Pozna","pages":"136-149","container-title":"Kraje słowiańskie w wiekach średnich. Profanum i sacrum. Slavonic countries in the Middle Ages. Profanum and sacrum","author":[{"family":"Janiak","given":"Tomasz"}],"issued":{"raw":"1998"}}