TY  - BOOK
AU  - Som, P
AU  - Ghosh, B N
TI  - Advanced surveying
U1  - 528 
PY  - 1982///
CY  - New Delhi
PB  - Tata McGraw-Hill
KW  - advanced surveying
KW  - Navigation
KW  - Nautical astronomy
KW  - Aeronautical astronomy
N1  -  ref. at the end of each chap
ER  -