?url_ver=Z39.88-2004&rft_id=0572&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Humpherys%2C+A.S.&rft.aufirst=A.S.&rft.aulast=Humpherys&rft.issue=1&rft.volume=29&rft.atitle=An+Automated+Single-Pipe+Irrigation+System&rft.date=1986&rft.title=Transaction+of+the+ASAE&rft.pages=185-193&rft.genre=article