Profion diweddar – wedi darfod erbyn hyn

  • Cambridge Histories Online
    Daeth y prawf i ben ar 18/12/2009
  • Oxford Scholarship Online (Y Gyfraith)
    Daeth y prawf i ben ar 22/12/2009
  • Scientific American
    Daeth y prawf i ben ar 31/12/2009
  • Oxford Scholarship Online (Law)
    Daeth y prawf i ben ar 14/02/2010
  • RefWorks
    Daeth y prawf i ben ar 28/02/2010.
  • Illustrated London News Historical Archive
    Daeth y prawf i ben ar 11/05/2010.
  • Dictionary of Irish Biography
    Daeth y prawf i ben ar 30/06/2010