TY  - GEN
AU  - Kannangara ,   M.L.T.
AU  - Gunasinghe , R.M.
AU  - Jayasinghe , E.M. 
TI  - Physics: advanced electromagnetism block 1 A
U1  - 537 
PY  - 1986///
CY  - Nugegoda
PB  - Open University
KW  - Physics
ER  -