Levelling of precision in India : heights of bench-marks in sheet no. ...
Survey of India.Trigonometrical Branch.
Dehra Dun : Office of the Trigonometrical Survey of India
Several editions of each sheet issued.
Description based on: sheet no. 34 (1916 edition)
Sheets 84 onwards have title: Levelling of precision in Burma : heights of bench-marks in sheet no. ...