General description of the principal triangulation of the Southern trigon : including the simultaneous reduction and the details of the component series: the great arc meridional, sec. 8° to 18°, and the Bombay longitudinal.
Survey of India.Trigonometrical Branch.
Dehra Dun : Office of the Trigonometrical Branch, Survey of India,
1890.
India. Great Trigonometrical Survey.
Geodesy
Triangulation