TY  - BOOK
AU  - Cohen,David
AU  - Cohen,David
TI  - Precalculus: a problems - Oriented approach 
SN  - 0314262091
AV  - QA39.2 .C64
PY  - 1987///
CY  - St Paul
PB  - West Publishing Co.
KW  - Mathematics
KW  - Problem solving
ER  -