Levelling Homepage Ordnance Survey's
Levelling
of Great Britain		 [1GL, 2GL Abstract]
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Files Held at Kew

'Levelling' Files

[General Levelling Files - 1GL - 2GL] (All | Viewed)

[Summary of Records of the Ordnance Survey of Great Britain]

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RefSourceDateNotes
+ - OS 13Ordnance Survey: Directorate of Field Survey: Branch Files1960-1981
OS 13/99Levelling Investigations and Coastal Geodesy1960 Sep 01-1977 Aug 01