Ramsay, Helena <br/><br/>
Step by step by science: sound 
Tourret, Pat 
 - New York  Franklin Watts  2006 
 - 32 Pages  Colour illustrations  28 cm 
<br/><br/> Juvenile 
<br/><br/><label>ISBN: </label>9780749629441 
<br/><br/><label>Dewey Class. No.: </label>J 534 RAMS