TY  - BOOK
AU  - Das, B.C.
AU  - Mukherjee, B.N.
TI  - Higher trigonometry, B.C. Das, eng
SN  - 818562495X
U1  - 516.24, 
PY  - 1996///
CY  - Calcutta, U.N. Dhur, In
ER  -