TY  - BOOK
AU  - Johnston,C.L.
TI  - Plane trigonometry, a new approach
T2  - The Appleton-Century mathematics series
SN  - 0136776744
U1  - 516.242 23
PY  - 1970///
CY  - New York
PB  - Appleton-Century-Crofts
KW  - Plane trigonometry
ER  -