?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Crowther%2C+Paul+Adrian&rft.aufirst=Paul+Adrian&rft.aulast=Crowther&rft.tpages=536&rft.title=Model+atmosphere+studies+of+Wolf-Rayet+stars&rft.degree=Doctoral&rft.date=1993&rft.inst=UCL+(University+College+London)