?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Vos%2C+Peter&rft.aufirst=Peter&rft.aulast=Vos&rft.date=2013&rft.title=Biofuel+versus+Food&rft.degree=Bachelor