?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Spoolder%2C+H.+A.+M.&rft.aulast=Spoolder&rft.aufirst=H.+A.+M.&rft.date=2007&rft.title=Prevention+and+treatment+of+parasitic+infections+in+organic+pigs&rft.genre=proceeding