?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Jahn%2C+Dr.+Marga&rft.aulast=Jahn&rft.aufirst=Marga&rft.date=2006&rft.title=Optimisation+of+different+physical+methods+for+control+of+seed-borne+pathogens+in+organic+vegetable+production&rft.genre=proceeding