Telecommunications /   by Colin Hynson.   

 - Hauppauge, NY :   Barron's Educational Series,   c2000.   
 - 32 p. : col. ill.   
 -  Modern Media   .
<br/><br/> Includes glossary and index <br/> 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Dewey Class. No.: </label>CIR 621.382 H998 2000