TY  - BOOK
AU  - Lock, J.B..
TI  - A Treatise on Elementary Trigonometry
U1  - 514 
PY  - 1901///
CY  - New York
PB  - Macmillan and co
KW  - Trigonometry
KW  - Elementary Trigonometry
KW  - G-Mathematics
ER  -