Worth, Richard <br/><br/>
Telegraph and telephone/ 
by Richard Worth 
 - London   World Almanac Library  c2006 
 - 48p.:  col. ill. 
<br/><br/> Includes glossary  
<br/><br/><label>ISBN: </label>9780836858792 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telegraph<br/>Telephone
<br/><br/><label>Dewey Class. No.: </label>621.38509