?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=K+R&rft.au=Krishna%2C+K+R&rft.aulast=Krishna&rft.date=1983&rft.title=Screening+for+the+efficiency+of+vesicular+arbuscular+mycorrhizal+fungi+on+Pearl+Millet+and+Sorghum+&rft.genre=proceeding