TY  - BOOK
AU  - Das, B. C. 
AU  - Mukherjee, B. N.
TI  - Higher secondary  trigonometry
U1  - 516.242 
PY  - 1977///
CY  - Calcutta
PB  - U. N. Dhur
KW  - Metric geometry
KW  - Trigonometry
N1  - Includes index
ER  -