11. IOR/V/19/243 Reference (shelfmark): IOR/V/19/243 Title: Survey of India Departmental Paper No. 6, Note on the measure of precision of levelling and proposal for the creation of a new category of levelling to be called levelling of high precision. C. Lallemand, transl. J. de Graaf Hunter. Dehra Dun, 1914 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1914 Extent: 1 volume
12. IOR/V/19/238 Reference (shelfmark): IOR/V/19/238 Title: Survey of India Departmental Paper No. 1, A consideration of the most suitable forms of type for use on maps. M.O'C. Tandy. Dehra Dun, 1913 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1913 Extent: 1 volume
13. IOR/V/19/239 Reference (shelfmark): IOR/V/19/239 Title: Survey of India Departmental Paper No. 2, A review of the boundary symbols used on the maps of various countries. M.O'C. Tandy. Dehra Dun, 1913 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1913 Extent: 1 volume