Details of the pendulum operations and of their reduction /
Basevi, James Palladio,1832-1871.
Heaviside, William James,1840-1915.
Survey of India.Trigonometrical Branch.
Dehra Dun : Office of the Trigonometrical Branch, Survey of India,
1879.
India. Great Trigonometrical Survey.
Geodesy
Geodesy
Triangulation
Triangulation