?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Kristensen%2C+Erik+Steen&rft.aulast=Kristensen&rft.aufirst=Erik+Steen&rft.date=2002&rft.title=Food+safety+in+an+organic+perspective&rft.genre=proceeding