?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Doyle%2C+Chris+J&rft.aulast=Doyle&rft.aufirst=Chris+J&rft.date=2002&rft.title=Potential+economic+gains+from+using+forage+legumes+in+organic+livestock+systems+in+northern+Europe+&rft.genre=proceeding