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      Celebrate Math Awareness Month

      Scientific American September 1994

      Crabshoot

      Manufacturers gamble on cancer vaccines--again

      • By Tim Beardsley

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      More in the September 1994 issue of Scientific American
      • Book Reviews--Unraveling the Past
      • Super Loops
      • 50 and 100 Years Ago: Construction of Airports and Inventions at the French War Office
      View Full Contents
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