Scarbrough, Mary Hertz,  <br/><br/>
Long-distance communication 

 - 32 pages :   colour illustrations ;   29 cm 
 - Yesterday & Today .
 - Yesterday & Today .
<br/><br/><label>ISBN: </label>1567118321 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication - History.
<br/><br/><label>Dewey Class. No.: </label>621.382