TY  - BOOK
AU  - Johnston,C.L
TI  - Plane trigonometry : : a new approach 
SN  - 0-13-677666-3 
AV  - QA533 .J64 1978
PY  - 1978///
CY  - Englewood Cliffs
PB  - Prentice-Hall
KW  - Plane trigonometry
KW  - Trigonomentry
N1  - Includes index
ER  -