?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Bos%2C+J.F.F.P.&rft.aulast=Bos&rft.aufirst=J.F.F.P.&rft.date=2007&rft.title=Comparing+energy+use+and+greenhouse+gas+emissions+in+organic+and+conventional+farming+systems+in+the+Netherlands&rft.genre=proceeding