TY  - BOOK
AU  - Singal M.K.
AU  - Singal,Asha Rani
ED  - National Council of Educational Research and Training (New Delhi),
TI  - Plane trigonometry
U1  - 514 
PY  - 1972///
CY  - New Delhi
PB  - National Council of Educational Research and Training
KW  - Plane trigonometry
KW  - Textbooks
KW  - Trigonometry
KW  - Mathematics
KW  - India
ER  -