TY  - GEN
AU  - Arthenayake,N.R.
AU  - Jayasinghe,E.M.cou.
AU  - Karunarathne,s uni.
AU  - Sriyananda,H.
TI  - Physical Science Book 1
U1  - 530 
PY  - 1985///
CY  - Nugegoda
PB  - Open University
KW  - Physics
ER  -