TY  - GEN
AU  - HUNGERFORD, Thomas
TI  - Precalculus: a graphing approach
SN  - 0-03-056511-1
AV  - QA 331 .3 .H86 
CY  - Austin
PB  - Holt, Rinehart and Winston
KW  - Functions
KW  - Algebra-- Graphic methods
ER  -