Levelling Homepage Ordnance Survey's
Levelling
of Great Britain		 [1GL, 2GL Abstract]
[1GL, 2GL Transcription]		 [Timeline]
[FBM List]		 TrigTools

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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+ - OS 11Ordnance Survey: Central Registry: Policy Paper Files (PP Series)1947-1982
OS 11/37Levelling1950-1969