TY  - BOOK
AU  - Duggal S.K.
TI  - Surveying
SN  - 9781259028991
U1  - 526.9 
PY  - 2013///
CY  - New Delhi
PB  - McGraw Hill
KW  - Surveying
KW  - Remote sensing
KW  - Geographic information systems
ER  -