TY  - GEN
AU  - à®à®²à®©à¯ R.C.D
TI  - à®ªà¯à®°à¯à®³à®¾à®¤à®¾à®°à®ªà¯ à®ªà¯à®³à¯à®³à®µà®¿à®µà®°à®µà®¿à®¯à®²à¯
U1  - 519.5024658 
PY  - 1969///
CY  - Colombo
PB  - Department of Education
KW  - Mathematics
ER  -