TY  - BOOK
AU  - Cayanan, Antonieta M.
TI  - The San Pedro Central School Grade 5 Pupils difficulties in solving the four fundamental  
AV  - CD-02361t 
PY  - 2011///-2012
CY  - Puerto Princesa City
PB  - Holy Trinity College
KW  - Education/Administration Supervision
N1  - Education/Administration Supervision
ER  -