TY  - BOOK
AU  - Demana, Franklin D.
TI  - Precalculus
SN  - 0131359622
AV  - QA 154.3 .P74 2009 
PY  - 2010///
CY  - USA.
PB  - Pearson Education.
KW  - 1. Algebra--Textbook. 2. Trygonometry--Textbooks
ER  -