TY  - BOOK
AU  - Durell,Clement V.
AU  - Robson,A.
TI  - Advanced trigonometry
U1  - 514 
PY  - 1934///
CY  - London
PB  - G. Bell and Sons
KW  - Trigonometry
N1  - "First published 1930. Reprinted 1934"
ER  -