TY  - BOOK
AU  - Swokowski,Earl W.
TI  - Precalculus: functions and graphs 
SN  - 0534920861 (hbk.)
PY  - 1990///
CY  - Boston
PB  - PWS-Kent
KW  - Functions
KW  - Algebra
KW  - Graphic methods
KW  - Trigonometry
N1  - Includes index
ER  -