1. IOR/V/19/21 Reference (shelfmark): IOR/V/19/21 Title: Account of the Operations of the Great Trigonometrical Survey of India, Vol 19A, Descriptions and heights of bench-marks on the southern lines of levelling. S.G. Burrard. Dehra Dun, 1910 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1910 Extent: 1 volume