?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=H+D&rft.au=Groote%2C+H+D&rft.aulast=Groote&rft.atitle=The+cost+of+accuracy+in+crop+area+estimation&rft.title=Agricultural+Systems&rft.date=2005&rft.volume=84&rft.pages=21-38&rft.issue=1&rft.genre=article