?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=K+H+M&rft.au=Siddique%2C+K+H+M&rft.aulast=Siddique&rft.date=2005&rft.title=legumes+in+sustainable+cropping+systems&rft.genre=proceeding