TY  - BOOK
AU  - Demana,Franklin D.
AU  - Waits,Bert K.
AU  - Clemens,Stanley R.
TI  - Precalculus mathematics: a graphic approach 
SN  - 0201529009 :
PY  - 1994///
CY  - Menlo Park, CA.
PB  - Addison-Wesley
KW  - Algebra
KW  - Trigonometry
ER  -