?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=L%C3%83%C2%B8es%2C+Anne-Kristin&rft.aulast=L%C3%83%C2%B8es&rft.aufirst=Anne-Kristin&rft.date=2006&rft.title=Repeated+undersowing+of+clover+in+stockless+organic+grain+production+&rft.genre=proceeding