Williams, Brian,  <br/><br/>
Communications 

 - 48 pages :   colour illustrations ;   26 cm 
 - Modern world series .
 - Modern world series .
<br/><br/> Includes indexes and glossary ; Timeline 
<br/><br/><label>ISBN: </label>9833440436 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science - Juvenile literature. ; Technology - Juvenile literature. ; Communications.
<br/><br/><label>Dewey Class. No.: </label>500