?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Zander%2C+Dr.+Katrin&rft.aulast=Zander&rft.aufirst=Katrin&rft.date=2008&rft.title=Diversification+and+specialisation+as+development+strategies+in+organic+farms&rft.genre=proceeding