TY  - BOOK
AU  - S.K. Duggal
TI  - Surveying Vol. 1
SN  - 9789353167509
U1  - 526.9 DUG-S 
PY  - 2017///
CY  - New Delhi
PB  - McGrawhil
KW  - Surveying
KW  - Mathematical Geography
KW  - Geology
ER  -