TY  - BOOK
AU  - Dumaguing, Lita D.
TI  - Solution analysis of mathematics problems of grade 9 students in Burgos District , La Union
U1  - TH 372.7 D89s 2017 
PY  - 2017///
CY  - City of San Fernando, La Union : 
PB  - [s.n.]
KW  - Secondary education
KW  - Mathematics
N1  - Bibliography: pages 223-227
ER  -