File:Collier's 1921 World War - German submarine blockade.jpg
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Size of this preview: 408 × 599 pixels. Other resolutions: 163 × 240 pixels | 327 × 480 pixels | 760 × 1,116 pixels.
Original file (760 × 1,116 pixels, file size: 351 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:06, 6 February 2014 | 760 × 1,116 (351 KB) | Library Guy | {{Information |Description ={{en|1=Map showing the locations of the German submarine war zone as of February 1, 1917, during World War I.}} |Source =''Collier's New Encyclopedia'', v. 10, 1921, p. 420. |Author =publ. by P. F. Collier... |
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