?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Kavouras%2C+Charalampos+N&rft.aufirst=Charalampos+N&rft.aulast=Kavouras&rft.title=Mid+Jurassic+to+earliest+Cretaceous+(Callovian-Ryazanian)+radiolaria+of+the+North+Sea+Basin&rft.date=1994&rft.degree=Doctoral&rft.tpages=481&rft.inst=UCL+(University+College+London)