TY  - BOOK
AU  - Das, B C,
TI  - Higher trigonometry
SN  - 9789380673837
U1  - 516.24 
PY  - 2013///
CY  - Calcutta
PB  - U. N. Dhur & Sons Pvt. Ltd.
KW  - Mathematics
KW  - Trigonometry
KW  - G-Mathematics
ER  -