TY  - BOOK
AU  - LOCK (J B)
TI  - Treatise on elementary trigonometry
U1  - 512/29 
PY  - 1895///
CY  - London
PB  - Macmillan & Co. Ltd.
KW  - trigonometry
KW  - Treatise
KW  - on
KW  - elementary
ER  -