TY  - BOOK
AU  - Siddons, A. W. 
AU  - Hughes, R. T. 
TI  - Trigonometry: Pt. 1 : Numerical trigonometry / 
U1  - 514 
PY  - 1943///
CY  - Cambridge : 
PB  - University Press 
KW  - Trigonometry
N1  - Includes Index.
ER  -