?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Freyer%2C+Bernhard&rft.aulast=Freyer&rft.aufirst=Bernhard&rft.date=2005&rft.title=Total+conversion+to+organic+farming+of+a+grassland+and+a+cropping+region+in+Austria%C3%A2%C2%80%C2%93+economic%2C+environmental+and+sociological+aspects&rft.genre=proceeding