TY  - BOOK
AU  - Walker, Colonel J. T.
TI  - Account of the operations of the great trigonometrical survey of India. Vol. I
U1  - 526.3 Wal/Acc 
PY  - 1870///
CY  - Dehradoon
PB  - The office of the great trigonometrical survey 
KW  - India
ER  -