TY  - GEN
AU  - Siddons,A.W.
AU  - Hughes,R.T.
TI  - Trigonometry / 
U1  - 516.24 
PY  - 1928///
CY  - London
PB  - Cambridge University Press, 
KW  - Mathematics
KW  - Trigonometry
KW  - Questions and answers
ER  -