TY  - BOOK
AU  - Hughes, R T
AU  - Siddons, A W
TI  - Trigonometry
U1  - 514 
PY  - 1928///
CY  - Cambridge
PB  - University Press
KW  - Mathematics
N1  - part II: Algebraical trigonometry part I: Numerical Trigonometry Part IV Infinite Series, Products, etc
ER  -