Letters to the Air Force on UFOs

Eitemau Tebyg

• The letters of the Earl of Chesterfield to his son
  gan: Chesterfield, Philip Dormer Stanhope, Earl of
  Cyhoeddwyd: (1901)
• William Cowper's letter. A selection edited by E. V. Lucas
  gan: Cowper, William
  Cyhoeddwyd: (1900)
• Lettere scelte
  gan: Plinio el Joven
  Cyhoeddwyd: (2007)
• Letters of four seasons
  gan: Ikeda, Daisaku, et al.
  Cyhoeddwyd: (1980)
• Lettere morali a Lucilio.
  gan: Séneca, Lucio Anneo
  Cyhoeddwyd: (1995)