TY  - BOOK
AU  - Coburn, John W.
AU  - Herdlick, J.D.
TI  - Precalculus: graphs and models 
SN  - 9789339204396
U1  - 515 
PY  - 2014///
CY  - New Delhi
PB  - McGraw Hill Education 
KW  - Functions
KW  - Graphic methods
KW  - Textbooks
KW  - Trignometry
N1  - Includes index
ER  -