TY  - BOOK
AU  - Drooyan,Lrving, Hadel, Walter.
AU  - x
TI  - Essentials of trigonometry: x
SN  - x
U1  - 516.24/DRE 
PY  - 1977///
CY  - N.Y.
PB  - Macmillan
KW  - Trigonometry
KW  - Geometry
N1  - x
ER  -