Catalogue description Ordnance Survey: Directorate of Field Survey: Refractive Index Experiment: Records.
Reference: | OS 19 |
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Title: | Ordnance Survey: Directorate of Field Survey: Refractive Index Experiment: Records. |
Description: |
Records not transferred |
Legal status: | Public Record(s) |
Language: | English |
Access conditions: | No records held at The National Archives for this series |
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