{"id":"001462042","type":"article","title":"Strongholds of the northern Masovia and their geographical location","publisher":"Polska Akademia Nauk","publisher-place":"Wrocław","pages":"79-105","container-title":"Archaeologia Polona, 48 (2010): Special theme: Archaeology of the Slavs","author":[{"family":"Ościłowski","given":"Jarosław"}],"issued":{"raw":"2015"}}