?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Paull%2C+John&rft.aulast=Paull&rft.aufirst=John&rft.date=2008&rft.title=Nano-in-food+-+Threat+or+Opportunity+for+Organic+Food%3F&rft.genre=proceeding