Trauxal,John G. <br/><br/>
The age of electronic messages 

 - Mcgraw-Hill Pub. 
<br/><br/><label>ISBN: </label>0070653194 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication
<br/><br/><label>Dewey Class. No.: </label>621.382 TRU