TY  - BOOK
AU  - Duggal, S. K.
TI  - Surveying
SN  - 0070534705
U1  - 526.9 
PY  - 2004///
CY  - New Delhi
PB  - Tata McGraw-Hill
KW  - Photogrammetric surveying
N1  - Volume 2; Includes index; SBD, Silchar
ER  -