General description of the principal triangulation of the North-East quadrilateral : including the simultaneous reduction and the details of five of the component series: the North-East longitudinal, the Budhon meridional, the Rangir meridional, the Amua meridional, the Karara meridional.
Survey of India.Trigonometrical Branch.
Dehra Dun : Office of the Trigonometrical Branch, Survey of India,
1882.
India. Great Trigonometrical Survey.
Geodesy
Geodesy
Triangulation
Triangulation