TY  - BOOK
AU  - Subrahmanyam,N.
AU  - Brij Lal.
TI  - Textbook of sound: for B. sc.( Pass, honours and subsidiary), Engineering students of Indian universities and IAS Examinations 
SN  - 0-7069-9817-0
U1  - 534 SUB 
CY  - New Delhi
ER  -