?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Hoerning%2C+Bernhard&rft.aulast=Hoerning&rft.aufirst=Bernhard&rft.date=2005&rft.title=Investigations+on+dairy+welfare+and+performance+on+German+organic+farms&rft.genre=proceeding