TY  - BOOK
AU  - Hebborn,J.E.
AU  - Plumpton,C.
TI  - Methods of trigonometry
T2  - Core books in advanced mathematics
SN  - 0333365372
PY  - 1984///
CY  - London
PB  - Macmillan Education
KW  - Trigonometry
N1  - Includes index
ER  -