TY  - BOOK
AU  - Beltran Yu,Romer F.
TI  - Development and validation of learning resources in mathematics 9
U1  - 510 
KW  - Development
KW  - Validation
KW  - Module
KW  - Print
KW  - Non-print learning material
KW  - Instructional materials
KW  - Exponents
KW  - Radicals
ER  -