1. IOR/V/19/19 Reference (shelfmark): IOR/V/19/19 Title: Account of the Operations of the Great Trigonometrical Survey of India, Vol 18, Astronomical observations for latitude made during the period 1885 to 1905 and the deduced values of the deflections of the plumb-line. S.G. Burrard. Dehra Dun, 1906 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1906 Extent: 1 volume