TY  - GEN
AU  - Jayasinghe , E.M
AU  - Jayarthne , Osmund 
TI  - Physics : waves and vibrations
U1  - 531.32 
PY  - 1995///
CY  - Nugegoda
PB  - Opean University
KW  - Physics
KW  - Waves and Vibrations
ER  -