?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Rattler%2C+Sabine&rft.aulast=Rattler&rft.aufirst=Sabine&rft.date=2006&rft.title=The+effect+of+different+fertilisers+on+hygienic+quality+of+lettuce&rft.genre=proceeding