Khanna, D. R. <br/><br/>
Text book of sound / 
by  D. R. Khanna and  R. S. Bedi 
 - 9th ed. 
 -  Atma Ram & Sons,   1969. 
<br/><br/><label>Subjects--Index Terms: </label>Physics 
<br/><br/><label>Dewey Class. No.: </label>534