TY  - BOOK
AU  - Amarasekara,C.D
TI  - Sound   :Unit 2
T2  - Waves in Physics -  PYU 1162
U1  - 530 AMA 
PY  - 2009///
CY  - Colombo
PB  - Open University
KW  -  physics
KW  - OUSL
N1  - Bachelor Science :Level 3
ER  -