TY  - GEN
AU  - Duggal, S.K.
TI  - Surveying
SN  - 0074620908
U1  - 526.9 
PY  - 1996///
CY  - New Delhi
PB  - Tata McGraw-Hill 
KW  - Mathematics
KW  - Surveying
KW  - Mathematical geography
KW  - Astronomy and allied sciences
ER  -