?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=Kathryn+Sarah&rft.au=Bostock%2C+Kathryn+Sarah&rft.aulast=Bostock&rft.date=1997&rft.tpages=187&rft.title=Group+reduction+and+its+application+to+chemical+problems&rft.inst=UCL+(University+College+London)&rft.degree=Doctoral