TY  - GEN
AU  - Annakkage ,  H.K.D.A.T.N.
AU  - Jayasinghearachchi , D.A 
TI  - Physics interference
U1  - 535.32 
PY  - 1989///
CY  - Nugegoda
PB  - Open University
KW  - PHYSICS
ER  -