Electronic communication systems 
Blake, Roy. 
 - 2nd ed. 
 -  Cengage Learning Asia Pte Ltd (Philippines Branch),  2010 
 - xx, 985 p. 
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<br/><br/><label>ISBN: </label>978-9-81243158-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication.
<br/><br/><label>Dewey Class. No.: </label>621.382 B636 2010