TY  - BOOK
AU  - Carpio, Joy N.
AU  - 
AU  - Guillermo, Jaymie M.
TI  - Plane trigonometry
SN  - 978-971-23-6822-6
U1  - 516.242 C298 2015 
CY  - Manila
PB  - Rex Book Store.
KW  - Plane trigonometry
KW  - Study and teaching
KW  - Problems, exercises, etc
N1  - Includes bib. references
ER  -