TY  - BOOK
AU  - Medina, F.A.
AU  - 
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 2
PY  - 1980///.46
CY  - Manila
PB  - National Research Council of the Phils,;National Research Council of the Philippines
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Arithmetic
KW  - sears0
N1  - Includes index; 5
ER  -