TY  - BOOK
AU  - Barnett,R.A.
TI  - Funtions and graphs: A precalculus course 
U1  - 512 14
PY  - 1985///
CY  - New York
PB  - McGraw Hill
KW  - Toán học
KW  - funtions
KW  - graphs
KW  - Mathematics
ER  -