TY  - BOOK
AU  - Keedy,Mervin L.
AU  - Bittinger,Marvin L.
TI  - Essential mathematics: a modern approach 
U1  - 513.142 K26e 1976 
PY  - 1976///
CY  - Reading, Mass
PB  - Addison-Wesley, 
KW  - MATEMATICAS
ER  -