TY  - BOOK
AU  - Khan, Muhammad Abdul Gafur.
TI  - Survey tutor in questions and answers: intended for the use of engineering and survey students 
U1  - 526.9 
PY  - 1977///
CY  - Dacca: 
PB  - Prabi printers, 
KW  - Astronomy
N1  - Includes index
ER  -