?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Peign%C3%83%C2%A9%2C+Jos%C3%83%C2%A9phine&rft.aulast=Peign%C3%83%C2%A9&rft.aufirst=Jos%C3%83%C2%A9phine&rft.date=2007&rft.title=Soil+structure+and+earthworm+activity+under+different+tillage+systems+in+organic+farming&rft.genre=proceeding