{"id":"001216738","type":"book","title":"The identification of wingless Betula fruits in Weichselian sediments in the Gross Todtshorn borehole (Lower Saxony, Germany), the occurrence of Betula humilis Schrank","pages":"107-115","container-title":"Vegetation History and Archaeobotany, 10,2 (2001","author":[{"family":"Freund","given":"Holger"}],"issued":{"raw":"2001"}}