Kerrod, Robin. <br/><br/>
How Things Work (Secrets of Science). 

 - 1st Ed. 
 -  Cherrytree Press Ltd,  1988. 
 - 31 p. 
<br/><br/><label>ISBN: </label>0745150217 
<br/><br/><label>Dewey Class. No.: </label>507.24  / KER