?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Paulsen%2C+Dr.+Hans+Marten&rft.aulast=Paulsen&rft.aufirst=Hans+Marten&rft.date=2008&rft.title=Growing+rapeseed+in+mixed+cropping+with+cereals&rft.genre=proceeding