?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Lukanowski%2C+Aleksander&rft.aulast=Lukanowski&rft.aufirst=Aleksander&rft.date=2006&rft.title=Results+of+studies+on+plant+health+in+organic+cultivation+on+the+background+of+other+farming+systems&rft.genre=proceeding