?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Nauta%2C+MSc+W.J.&rft.aulast=Nauta&rft.aufirst=W.J.&rft.date=2008&rft.title=Principles+and+practicality+of+organic+dairy+cattle+breeding%3A+different+options+and+implications&rft.genre=proceeding