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Field name | Value |
---|---|
Reference | WO 158/151 |
Title | Reports and Diagrams from 171st and 250th Tunnelling Companies, Royal Engineers, and Other Tunnelling Companies |
Library/Archive | The National Archives |
Copyright | Crown Copyright |
Date | 4 September 1917 - 22 September 1917 |
Document Type | Correspondence; Manuscript; Official Papers; Map |