Catalogue description Ordnance Survey: Directorate of Field Survey: Refractive Index Experiment: Records.

Details of OS 19

Reference:	OS 19
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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