TY  - BOOK
AU  - Cohen, David
TI  - Precalculus: a problems-oriented approach 
SN  - 0314778713
AV  - QA39.2 .C63 1984
PY  - 1984///
CY  - St. Paul
PB  - West Publishing
KW  - Mathematics
KW  - 1961-
KW  - Problem solving
N1  - lncludes index
ER  -