?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Gundersen%2C+Hanne&rft.aulast=Gundersen&rft.aufirst=Hanne&rft.date=2006&rft.title=TOLERANCE+OF+CEREALS+TO+POST-+EMERGENCE+WEED+HARROWING&rft.genre=proceeding