{"id":"003017966","type":"book","title":"Birka's black earth harbour","publisher":"Archaeological Research Laboratory, Stockholm University","publisher-place":"Stockholm","author":[{"family":"Kalmring","given":"Sven 1976-"},{"family":"Holmquist Olausson","given":"Lena 1953-"},{"family":"Wendt","given":"Antje"}],"issued":{"raw":"2021"}}