TY  - GEN
AU  - Jayasinghe , E.M.
AU  - Jayaratne , Osmund 
TI  - Physics PHU 2141 waves and vibrations book 1: course of study leading to the degree of bachelor of science level four
U1  - 530.416 
CY  - Nugegoda
PB  - Open University
KW  - Physics
ER  -