Kerrod, Robin. <br/><br/>
Communications / 
Robin Kerrod 
 - New York :  Marshall Cavendish,  1994 
 - 64 p :  ill 
 - Let's Investigate Science .
<br/><br/><label>ISBN: </label>1854356240 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication--Juvenile literature.
<br/><br/><label>LC Class. No.: </label>TK5102.4  / K41 C6 1994