{"id":"001182231","type":"book","title":"Bio- and lithostraigraphical investigations of a sediment core from the Björkö Strait, Lake Mälaren, offshore from the excavations in the Black Earth","pages":"189-204","container-title":"PACT, 52 (1997","author":[{"family":"Björck","given":"Jonas"}],"issued":{"raw":"1997"}}