TY  - GEN
AU  - Kannangara ,  M.L.T.
AU  - Jayasinghe , E.M.
AU  - Liyanage , L.S.G.
TI  - Physics: advance electro magnetism
U1  - 537 
PY  - 1986///
CY  - Nugegoda
PB  - Open University
KW  - Physics
ER  -