?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Roderick%2C+Steve&rft.aulast=Roderick&rft.aufirst=Steve&rft.date=2006&rft.title=Diversity+of+organic+livestock+systems+in+Europe&rft.genre=proceeding