TY  - BOOK
AU  - Heckenbach,Alan J.
AU  - Kegley,J.Colby
TI  - Elementary functions: an approach to precalculus mathematics
AV  - QA331.3 .H4
U1  - 517 
PY  - 1970///]
CY  - [New York]
PB  - Macmillan
KW  - Functions
KW  - Local
ER  -