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      Digital & 4-Year Archive

      Scientific American June 30, 1917

      Exploring the Burrows of the German Army

      Elaborate and Well Furnished Subterranean Dwellings
      [bunkers and dugouts on the Western Front]

      • June 30, 1917

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      More in the June 30, 1917 issue of Scientific American
      • Index- June 30, 1917
      • Inventions New and Interesting- June 30, 1917
      • American Supremacy of the Air
      View Full Contents
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