?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Donnelly%2C+Eric&rft.aulast=Donnelly&rft.aufirst=Eric&rft.date=2002&rft.title=Potential+and+historical+Uses+for+bracken+(Pteridium+aquilinum+(L.)+Kuhn)+in+organic+agriculture&rft.genre=proceeding