TY  - GEN
AU  - Agor, R.
TI  - A text book of surveying & levelling
U1  - 526.9 
PY  - 2002///
CY  - Delhi
PB  - Khanna 
KW  - Map projections
KW  - Linear measurement
KW  - Chain surveying
KW  - Reduction diagram
ER  -