The Aragonese Double Crown & the Borja or Borgia device with notes upon the bearing of such insignia in the fourteenth and fifteenth centuries

Eitemau Tebyg

• The Ordnance of the fourteenth and fifteenth centuries
  gan: Clephan, Robert Coltman
  Cyhoeddwyd: (1911)
• The double tressure
• An Outline of the history and development of hand firearms, from the earliest period to about the end of the fifteenth century
  gan: Clephan, Robert Coltman
  Cyhoeddwyd: (1906)
• Armorial bearings of British schools
  gan: Christie-Murray, David
  Cyhoeddwyd: (1968)
• One hundred and fourteenth Annual Report
  Cyhoeddwyd: (1952)