TY  - BOOK
AU  - Basak,N.N.
AU  - Van Amringe,J.Howard
TI  - Surveying and leveling
U1  - BAS 
PY  - 1999///
CY  - New Delhi
PB  - MecGrah  Hill.
KW  - Surveying
KW  - NUST
ER  -