The principal triangulation : the great arc (section 24°- 30°), Rahun, Gurhagarh and Jogi-Tila meridional series, and the Sutlej series of the North-West Quadrilateral /
Walker, James Thomas,1826-1896.
India.Great Trigonometrical Survey.
Dehra Dun : Office of the Great Trigonometrical Survey,
1876
"Issued in 1876."
India. Great Trigonometrical Survey.
Geodesy
Geodesy
Triangulation
Triangulation