?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Howarth&rft.aufirst=Christopher&rft.au=Howarth%2C+Christopher&rft.date=1990&rft.tpages=189&rft.title=Studies+of+small-angle+electron+positron+collisions+at+high+energy&rft.inst=UCL+(University+College+London)&rft.degree=Doctoral