?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Somanath%2C+Sushela+Devi&rft.aufirst=Sushela+Devi&rft.aulast=Somanath&rft.degree=Doctoral&rft.tpages=318&rft.title=Colicinogenic+plasmids+and+inhibitor+sensitivity+in+Escherichia+coli&rft.inst=UCL+(University+College+London)&rft.date=1991