Overman, Michael,  1920-, <br/><br/>
Understanding telecommunications / 
by Michael Overman. 
 - London :  Lutterworth,  1974. 
 - 192 pages :  illustrations ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0718820037 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication.<br/>Telecommunication--History.