?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Eurola&rft.aufirst=Merja&rft.au=Eurola%2C+Merja&rft.date=2003&rft.title=Trace+elements+in+rye+-+comparison+of+organic+and+conventional+cultivation&rft.genre=proceeding