?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Kuehne%2C+Stefan&rft.aulast=Kuehne&rft.aufirst=Stefan&rft.date=2005&rft.title=Implementation+of+bioherbicides+and+seed+treatment+in+organic+farming&rft.genre=proceeding