?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Koch%2C+E.&rft.aulast=Koch&rft.aufirst=E.&rft.date=20+August+2009&rft.title=Methods+for+seed+treatment+in+organic+farming+&rft.genre=proceeding