?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Kristiansen%2C+Paul+Erik&rft.aulast=Kristiansen&rft.aufirst=Paul+Erik&rft.date=June+2003&rft.title=Sustainable+Weed+Management+in+Organic+Herb+and+Vegetable+Production&rft.inst=University+of+New+England