?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Hegelund%2C+L.&rft.aulast=Hegelund&rft.aufirst=L.&rft.date=2005&rft.title=Measuring+fearfulness+in+organic+egg+production&rft.genre=proceeding