1. IOR/V/19/18 Reference (shelfmark): IOR/V/19/18 Title: Account of the Operations of the Great Trigonometrical Survey of India, Vol 17, Electro-telegraphic longtitude operations executed during the years 1894-95-96 [and] The Indo-European arcs from Karachi to Greenwich. S.G. Burrard. Dehra Dun, 1901 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1901 Extent: 1 volume