TY  - BOOK
AU  - Das,B.C., Mukherjee, B.N.
AU  - x
TI  - Higher trigonometry: x
SN  - x
U1  - 516.24/D229h 
PY  - 1986///
CY  - Calcutta
PB  - U.N. Dhur
KW  - Trigonometry
N1  - x
ER  -