TY  - BOOK
AU  - Endonela, Lisa D. 
TI  - Best practices of secondary mathematics teachers in teaching the four fundamental operations of integers / 
U1  - TH 371.1 En2b 2017 
PY  - 2017///
CY  - Agoo, La Union
PB  - [s.n.]
KW  - Teachers
N1  - Bibliography: pages 78-81
ER  -