{"id":"001462044","type":"article","title":"The non-ferrous metal finds from the early medieval stronghold and settlement complex of Sypniewo in northern Masovia","publisher":"Polska Akademia Nauk","publisher-place":"Wrocław","pages":"107-119","container-title":"Archaeologia Polona, 48 (2010): Special theme: Archaeology of the Slavs","author":[{"family":"Biermann","given":"Felix."}],"issued":{"raw":"2015"}}