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      Scientific American May 1915

      Protecting a Retreating Army

      Effective Methods of Destroying Its Lines of Communications

      • May 1, 1915

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      More in the May 1915 issue of Scientific American
      • Notes and Queries - May 1, 1915
      • The Submarine as a Commerce Destroyer, Scientific Solidarity in Wartime and more
      • The Bullets of the Fighting Nations
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