TY  - BOOK
AU  - Carolyn C. Wheater 
TI  - Easy Pre-Calculus Step-by-Step: Master high-frequency concepts and skills-fast!
SN  - 978-1-260-13511-4
U1  - Cir. 515 W55 C2019 
PY  - 2019///
CY  - USA: 
PB  - McGraw Hill Education; 
ER  -