TY  - BOOK
AU  - Levett,R.
AU  - Davison,C.
ED  - Asutosh Collection (National Library, India)
TI  - The elements of plane trigonometry c
U1  - 514.5 
PY  - 1892///
CY  - London
PB  - Macmillan
KW  - Plane trigonometry
KW  - Trigonometry
ER  -