Details of the principal triangulation of five of the component series of the Southern trigon including the following series: the South Konkan coast, the Mangalore meridional, the South-East coast, the Madras meridional and coast, the Madras longitudinal.
Survey of India.Trigonometrical Branch.
Dehra Dun : Office of the Trigonometrical Branch, Survey of India,
1890.
India. Great Trigonometrical Survey.
Geodesy
Triangulation