{"id":"003013548","type":"book","title":"The stronghold in Grzybowo in the context of interdisciplinary research into the functions of early medieval strongholds from the 10th and 11th centuries","publisher":"Poznańskie Towarzystwo Przyjaciół Nauk and author","publisher-place":"Pozna","author":[{"family":"Danielewski","given":"Marcin 1984-"}],"issued":{"raw":"2021"}}