Similar Items

• The extraterrestrial life debate, antiquity to 1915 a source book /
  by: Crowe, Michael J.
  Published: (2008)
• The extraterrestrial encyclopedia : an alphabetical reference to all life in the universe /
  by: Darling, David J.
  Published: (2000)
• Extraterrestrial civilizations /
  by: Asimov, Isaac, 1920-1992
  Published: (1979)
• Extraterrestrial intelligence/
  by: Heidmann, Jean
  Published: (1997)
• Extraterrestrial civilization : problems of interstellar communication /
  Published: (1971)