Encyclopaedia of the twentieth century /

Eitemau Tebyg

• Hutchinson's twentieth century encyclopaedia. /
• Twentieth Century
  gan: Colton, Joel
  Cyhoeddwyd: (1970)
• The Twentieth Century
  gan: Ware, Caroline F
  Cyhoeddwyd: (1966)
• The Twentieth Century
  gan: Ware, Caroline F
  Cyhoeddwyd: (1966)
• Twentieth century
  gan: Colton,joel