?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=de+Wit%2C+Jan&rft.aulast=de+Wit&rft.aufirst=Jan&rft.date=2006&rft.title=Milk+fatty+acids+in+relation+to+feeding+practices+on+Dutch+organic+farms+&rft.genre=proceeding