TY  - BOOK
AU  - Bittinger,Marvin L.
TI  - Precalculus: graphs and models : a unit circle approach 
SN  - 0201616750
AV  - QA154.2 .P725 2001
U1  - 512 21
PY  - 2001///
CY  - Boston
PB  - Addison-Wesley
KW  - Algebra
KW  - Graphic methods
KW  - Trigonometry
N1  - Includes index
ER  -