TY  - BOOK
AU  - Jayathilaka, M.M.
TI  - à¶à¶½à·à·âà·à¶à¶ºâââ à¶à¶à¶à¶º IV
U1  - 535 
PY  - 2009///
CY  - Nugegoda
PB  - Open UNiversity
KW  - LIGHT
ER  -