?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Kivinen%2C+Tapani&rft.aulast=Kivinen&rft.aufirst=Tapani&rft.date=2003&rft.title=Organic+piggery+models+for+Finnish+climate&rft.genre=proceeding