?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Trautz%2C+Prof.+Dr.+Dieter&rft.aulast=Trautz&rft.aufirst=Dieter&rft.date=2006&rft.title=Cultivation+and+analysis+of+anthocyanins+containing-%2C+blue+potatoes&rft.genre=proceeding