?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Lenc%2C+Leszek&rft.aulast=Lenc&rft.aufirst=Leszek&rft.date=2006&rft.title=Research+on+health+of+organically+cultivated+potatoes&rft.genre=proceeding