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         Astronomy News:     more books (100)
  1. Tunguska - Impact in Siberia 1908, Comets, Asteroids, and Near-Earth Object Threats, NASA Programs to Survey and Study Asteroids and Comets (CD-ROM) by World Spaceflight News, 2007-04-06
  2. 20th Century NASA History: Apollo Technical Reports - Set C, Spacecraft Systems and Program Procedures, Part One (Six CD-ROM Set) by World Spaceflight News, 2008-06-18

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