?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Gil+Sierra%2C+Jacinto&rft.aufirst=Jacinto&rft.aulast=Gil+Sierra&rft.atitle=Concepto+y+situaci%C3%B3n+en+Espa%C3%B1a+de+la+agricultura+de+precisi%C3%B3n&rft.title=Vida+Rural&rft.issue=271&rft.issn=1133-8938&rft.date=June+2008&rft.pages=0-0&rft.genre=article