TY  - BOOK
AU  - Duggal, S.K 
TI  - Surveying 
SN  - 9780070151376
U1  - 624.18 DUG  
PY  - 2012///
CY  - Tata mcgraw hill company Ltd. 
PB  - New Delhi 
KW  - SURVEYING
ER  -