Waves and sound 

 - 2nd ed 
 - London  Pegasus  2014 
 - 30 p. : color ill ; 22 cm 
<br/><br/><label>ISBN: </label>9788131912430 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Dewey Class. No.: </label>534 PEG