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      Knowledge is Power

      Scientific American June 1943

      Latest Helicopter

      Is a Two-Seater with Enclosed Cockpit; Will Assist In Allied Convoy Protection Against Subs

      • By Alexander Klemin on June 1, 1943

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      More in the June 1943 issue of Scientific American
      • Current Bulletin Briefs, June 1943
      • Planet Companions
      • Decking Material, "Sea-Sickness" Machine
      View Full Contents
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