TY  - BOOK
AU  - "Wijewardana, H."
TI  - à¶à·à¶¸à¶«à·à¶à¶»à¶«à¶º
U1  - 658 
PY  - 1993///
CY  - Isurupaya
PB  - "Dept.of Education,"
KW  - management
ER  -