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Looking Outward: Mars and the Mind of Man. A panel discussion, Pasadena, Calif., Nov. 1971. Ray Bradbury, Arthur C. Clarke, Bruce Murray, Carl Sagan, and Walter Sullivan. Harper and Row, New York,
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Carl sagans cosmic connection extraterrestrial perspective | Astronomy (general) | Cambridge University Press
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The Cosmic Connection: An Extraterrestrial Perspective: Sagan, Carl: 9780385004572: Amazon.com: Books
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