?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Delate%2C+Dr.+Kathleen&rft.aulast=Delate&rft.aufirst=Kathleen&rft.date=2008&rft.title=Beneficial+System+Outcomes+in+Organic+Fields+at+the+Long-Term+Agroecological+Research+(LTAR)+Site%2C+Greenfield%2C+Iowa%2C+USA+&rft.genre=proceeding