Blake, Roy <br/><br/>
Comprehensive electronic communication 
Roy Blake 
 - Minneapolis  West Publishing Company  1997 
 - xviii,792p.  ill.  25cm. 
<br/><br/> Includes Index 
<br/><br/><label>ISBN: </label>0314201408 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunications