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      Spring Flash Sale

      Scientific American August 1996

      Great Books and City Crops

      • By Philip Morrison, Phylis on August 1, 1996

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      More in the August 1996 issue of Scientific American
      • 50, 100 and 150 Years Ago: The Magnesium Age, Compressed Air Motor and Uninhabited Moon
      • Aliens at Play
      • Exploring the Business of Space
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