?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=G+V+S&rft.au=Rao%2C+G+V+S&rft.aulast=Rao&rft.atitle=Response+of+the+Pigeonpea-Rhizobium+symbiosis+to+salinity+stress%3A+variation+among+Rhizobium+strains+in+symbiotic+ability&rft.title=Biology+and+Fertility+of+Soils&rft.issn=0178-2762&rft.date=1990&rft.volume=9&rft.pages=49-53&rft.issue=1&rft.genre=article