TY  - BOOK
AU  - Oronce, Orlando A. 
TI  - Exploring Mathematics IV, advanced algebra and trigonometry : : worktext in Mathematics for secondary schools 
SN  - 9789712335761
AV  - QA 152.2  .Or74 2003  
U1  - FIL 512  
PY  - 2003///.
CY  - Manila : 
PB  - Rex Bookstore, 
ER  -