?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=Ronald+John&rft.au=Ley%2C+Ronald+John&rft.aulast=Ley&rft.title=The+effect+of+containment+measures+applied+to+the+exhaust+gas+of+a+fermenter&rft.date=2000&rft.degree=Doctoral&rft.tpages=206&rft.inst=UCL+(University+College+London)