Subrahmanyam, N; Brij Lal <br/><br/>
Textbook of sound 

 -  Vikas Publishing House Pvt. Ltd., New Delhi  1975 
 - 239 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sound & related vibrations; Physics
<br/><br/><label>Dewey Class. No.: </label>534  SUB-T