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Retrieve imperfect matches to accommodate spelling variations or approximate spellings sometimes found in historical documents.

Full Citation

Full Citation

  • Title Invisible ink and secret writing: first volume on World War 1 secret writing
  • Subcollection KV 3: Subject (SF series) Files
  • Creation Date 1917-1919
  • Declassified Date November 18, 1997
  • Classification Level Unclassified
  • Language English
  • Document Type Government document
  • Manuscript Number KV 3/2
  • Source Library The National Archives (Kew, United Kingdom)
  • Copyright Statement Images reproduced by courtesy of The National Archives, London, England,
  • Gale Document Number GALE|BNOTVW005137799

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