?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Wier%2C+Mette&rft.aulast=Wier&rft.aufirst=Mette&rft.date=2000&rft.title=Modeling+demand+for+organic+foods&rft.genre=proceeding