Mars and themind of man - Bradbury, Ray 1920. (New York Harper & Row, 1973)
Panel discussion held in No.v 1971 at the California institute of Technology, with R. Bradbury, A. C. Clarke B. Murray, C. Sagan and W.Sullivan ; with afterthoughts written after Oct. 1972
Keywords: Space flight to Mars; Project Mariner; Mars (Planet) -- Exploration; Astronautics and civilization