In twenty years; our common future.

Eitemau Tebyg

• Twenty-five years of Indian independence
  gan: Indian Oxygen Ltd
  Cyhoeddwyd: (1972)
• Twenty years of nationalisation: the British experience
  gan: Kelf-Cohen, R
  Cyhoeddwyd: (1969)
• Twenty years after /
  gan: Dumas, Alexandre
  Cyhoeddwyd: (1973)
• Twenty years of nationalisation
  gan: Kelf-Cohen, R.
• Twenty-one years. /
  gan: Churchill, Randolph S.
  Cyhoeddwyd: (1965)