?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Blom-Zandstra%2C+Dr.Ir.+M.&rft.aufirst=M.&rft.aulast=Blom-Zandstra&rft.date=2006&rft.title=Priorities+and+approach+of+the+Dutch+research+in+organic+food+and+farming&rft.genre=proceeding