{"id":"000029551","type":"book","title":"Prehistoric raised fields in the Upper Midwestern United States : an innovation in response to marginal growing. - Amityville, NY","container-title":"North american archeologist ; 2.1980-81, no. 2, S. 101-116 : 5 Ill","author":[{"family":"Riley","given":"Thomas J."}],"issued":{"raw":"1980"}}