Catalogue description Invisible ink and secret writing: first volume on World War 1 secret writing

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Details of KV 3/2
Reference: KV 3/2
Description:

Invisible ink and secret writing: first volume on World War 1 secret writing

Date: 1917-1919
Held by: The National Archives, Kew
Former reference in its original department: SF 52-2-3
Legal status: Public Record(s)
Closure status: Open Document, Open Description
Access conditions: Retained Until 1997
Record opening date: 18 November 1997

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