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      Scientific American April 1937

      Current Bulletin Briefs, April 1937

      Bulletins listed as being obtainable through Scientific American can be supplied only by mail

      • April 1, 1937

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      More in the April 1937 issue of Scientific American
      • Immunity for the Witness
      • Our Point of View, April 1937
      • Smoke Out Thieves, Skin Writing and more
      View Full Contents
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