TY  - BOOK
AU  - Das,B.C.
AU  - Mukherjee,B.N.
TI  - Higher Secondary Trigonometry 
SN  - 8185624887
U1  - 510 
PY  - 1976///
CY  - Calcutta
PB  - U.N.Dhur & Sons Private Limited 
KW  - Mathematics
ER  -