?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Williams%2C+Jane&rft.aulast=Williams&rft.aufirst=Jane&rft.degree=Master's+Thesis&rft.date=17+December+1985&rft.title=Moraxella+bovis+pili%3A+Phase+alternation+between+two+types+for+each+strain&rft.inst=University+of+Pittsburgh&rft.tpages=91