TY  - BOOK
AU  - Duggal, S. K  
TI  - Surveying. 
SN  - 9781259028991
U1  - 526.9 
PY  - 2013///
CY  - New Delhi : 
PB  - McGraw Hill Education, 
KW  - Surveying
N1  - Include Indexes
ER  -