?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Knickel%2C+Dr.+Karlheinz&rft.aulast=Knickel&rft.aufirst=Karlheinz&rft.date=2006&rft.title=Sustainable+Food+Supply+Chains+in+Europe&rft.genre=proceeding