Tiwari, Surya Prakash <br/><br/>
Dhvani 

 - New Delhi  Vigyan Bharati  1996 
 - 47p. p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sound ;Hindi
<br/><br/><label>Dewey Class. No.: </label>534  / TIW