TY  - GEN
AU  - Perera , I.K.
AU  - Gunasinghe , R.M.
AU  - Jayarathne , E.M.
AU  -  Jayasinghe , E.M. 
TI  - Physics: basic electromagnetism
U1  - 537 
PY  - 1985///
CY  - Nugegoda
PB  - Open University
KW  - Physics
ER  -