Wahida Abdullah,  <br/><br/>
Communication 

 - 27 pages :   illustrations ;   20 cm 
 - History of science and mathematics series .
 - History of science and mathematics series .
<br/><br/><label>ISBN: </label>9830533425 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Readers ; Telecommunication - Juvenile literature ; Communication - Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>428.6