TY  - BOOK
AU  - Todhunter,I.
AU  - Hogg,R.W.
TI  - Key to Todhunter and Hogg's plane trigonometry
U1  - 514.5 
PY  - 1895///
CY  - London
PB  - Macmillan
KW  - Trigonometry
KW  - Problems, exercises, etc
KW  - Plane Trigonometry
ER  -